作文事例英语初中范文 第一篇

假如你班要就“如何为中考做准备”开一个主题班会，请写一篇发言稿，谈谈你认为在中考准备过程中要注意的事项及理由：1.保持良好情绪。不要焦虑和紧张，否则会没有面对困难的勇气。2.制定合适的`目标。太低的目标使人懒散，太高的目标使人失去信心。3.不要熬夜，以确保上课时精力旺盛，注意力集中。4.多与父母、老师、同学交流沟通，以便走出困境。5.谈谈你的观点。

Boys and girls, the final exams are coming. What should we do in order to prepare well for the exams? Here are some suggestions.

Firstly, its very important for us to be in good moods. Dont be nervous or stressed. Otherwise, we will not have the courage to face difficulties. Secondly, we should have proper aims. If we aim too low, we may become lazy. If we aim too high, we may lose confidence. Thirdly, Dont stay up late so that we can make ourselves energetic in class and pay attention to our study. Fourthly, wed better have more communication with our parents, teachers and classmates. They can help us get out of trouble. Finally, a healthy diet is very useful as well.

With these done, I believe we can be successful in the exams.

作文事例英语初中范文 第二篇

Night, I alone sit in the pavilion, the cold stone table, I knock gently with fingertips, a small voice. I closed my eyes, quietly enjoy the solitude, at the same time, also waiting for my friend. When the cicadas are no longer so loud, bamboo forest birds frightened to fly off, the bright light shines through, I know, friends came. Day and night, when I feel lonely, and he with me; In my sad sad, he would listen to me quietly, listening to my troubles, share with me the trouble, let I no longer worry, sad for anything. He has a clear - the name of the moon.

He in heaven, I on the ground, and when I looked up, his bright moonlight as a beacon, but not so dazzling, light up my eyes the winding road. Pointed out the direction for me.

I looked along the winding path, in the thick trees also could not prevent him a faint light, mottled broken shadow, little moon, dark white, lying on the ground.

作文事例英语初中范文 第三篇

The definition of happiness always causes the public’s attention. Somepeople believe that making a lot of money and earning great reputation are thestandard to define success, while some people think that spending more time withtheir families deserves all the things and it is their bliss. In my opinion, themeaning of happiness varies according to different people, but there is onething in common, which is their positive attitude to life. I am so lucky to bornin a happy family, and my parents give me all their love. Though we areordinary, I am so satisfy with my life now. I cherish the thing I have.

作文事例英语初中范文 第四篇

On New Year's Eve，our class had a party. The atmosphere was good. It was out of the ordinary from the very begining. The boy student from one bedroom gave an unusual performance. We saw a boy named Li Xinmin turn off all the lights in a sudden snap. Then with three resounding crow of a cock echoing in the hall，the hall was again brightly lit in a snap.

Then，the representative of the bedroom Zhu Guozhang asked us to guess a line of a poem related to the above situation. He added that Li Xinmin alone was born in the year of the dog and the other three were all born in the year of the chicken. They left us all in confusion. And it was our monitor who was quickwitted。 He shouted our“The day breaks as the cock crows three times at dawn.” The hall After that，they had another item. This time Li Xinmin was placed in the middle of the circle. While he was standing there，the other three stood around him，each bowing down to him at an angle of 120 degrees. It was an idiom. This time I got it right：“The dog stands out among a group of chickens.”

作文事例英语初中范文 第五篇

My best friend. Her voice, gestures, like flipping the stain, lingering inmy mind.

She is plain, is always dressed in a white sportswear. Her name ismeaningful because she likes to eat "is green didn't eat, eat is red, spit itout is black, watermelon." As a result, her name is chancy.

She studies very well. An enviable, many people because the wrestled withher. Read English in a cram school teacher roll call to let her. She picked upthe English book from the table, straightened up, use the read out loud gracefully, articulate, read smoothly, their English. Chancy not only a goodknowledge of English, mathematics or envy letting a person. The test, I got astep careless, at sixes and sevens. And she is easily captured the first. Classis to encourage me, help me solve problems you do not understand. Gradually, weboth became best friends. Play together, study together, talk together. Thesunset is always our shadows lengthen.

作文事例英语初中范文 第六篇

I have heard about an impressive story. It was said that an old lady drunk the old tea every day, but she had fresh tea, because she did not want to waste the old tea, so she kept drinking the old one while making the new one old all the time. The first thing for me to think about was to give up the old tea and drink the fresh one every day. The old lady presents the people who once were poor and they still lived the poor way even their life were better. If they change their thinking mode and enjoy better quality, life will be much better.

作文事例英语初中范文 第七篇

Study Plan

At the beginning of this term, I made a plan for my study. Now, I find that I carry it out well in the past month. I was poor in Chinese and English last semester. Therefore, I put the two subjects in the priority and I spent much time on them. Happily, I made progress in the two subjects this semester. Besides, math and physics is not so hard for me, but I must do many exercises to improve my knowledge. Half of an hour for each is necessary and I have always been doing so. The other subjects are easy for me. As long as I carefully listen to the teacher in the class and do some reviews, I can do well in them. While, it does not mean that I attach no importance to them. I make plan for my study to ensure the efficiency of my study.

开学之初，我给我的的学习制定了一个计划。现在，我发现在过去的一个月我能够很好的实行。上个学期我的语文和英语很差，因此我把这两个科目作为我的首要任务并花很多时间在上面。很高兴的是，这学期我这两科取得了进步。此外，数学和物理对我来说不是很难，但是我必须多做练习来增加我的知识。每个科目花上半个小时是有必要的，我一直都是这样做的。其他的科目对我来说很容桂。只要我课堂上认真听课，课后复习我就能够把它们做好。但是，这也不意味着我不重视它们。我给我的学习制定计划以保证我的学习效率。

通过上面我对我的学习计划的介绍，希望给同学们的学习很好的帮助，相信同学们会学习的很好的哦。

作文事例英语初中范文 第八篇

Basketball is my favorate sports. Different people love differentsports,and in the GAME, the ethletic according to his or her talent take part inthe different games. But , for me i love basketball so much!

First, basketball game is a team game,so every body have to support andcoporation together that can finish this game well.

second, basketball game is a way for relax. it's good for body and good formind too.

fanilly,it's a good exercise to everybody, it is good to our health.

In all ，basketball game is my favorate sports.。

作文事例英语初中范文 第九篇

Health is very important for everyone. So people want to have a healthylife.

In fact everyone can have a healthy life. Such as: I usually eat fruitvegetables eggs and rice. I hardly eat burgers. I think we could eat meat andice-cream amount. Water and milk are good for your health. It’s important toplay basketball run and have enough sleep. We couldn’t spend a long time forwatching TV and playing computer. It’s bad for our eyes.

We should keep happy confident helpful and friendly. I don’t think nervousand angry are good for our health.

作文事例英语初中范文 第十篇

The environmental pollution is worse and worse today. Many trees are cutdown, and water and air are polluted. As a student I try to have a low-carbonlife to save energy and reduce pollution.

Firstly, I often walk to school. It can reduce air pollution. Secondly, Ialways turn off the lights and fans when leaving the classroom. Thirdly, Ialways make full use of paper and other school things and never waste water.

I wish more students to join me and make the earth more and morebeautiful.

作文事例英语初中范文 第十一篇

As we all know, nowadays, more and more students admire idols. In our school, there are also many students who admire idols. Some of them like TF Boys, or some of them are fans for Jay Chou. Almost everyone has their own idols that they we should think how to admire our idols properly. As far as I know, some students like listening to their idols' songs, some students discuss the movies they like in the classroom, in the school, at home and everywhere. And some students buy the idols pictures, they spend much money buying the idols posters. Also, some students search the Internet to learn about their idols as soon as they get home. They even forget to do their homework. They spend too much time and money. They dont often work hard any more and fail the exams. They even buy the clothes which their idols wear. Because they think they're you think these are right? I think they arent. Although it is not wrong to admire idols. But we should admire them properly, shouldnt we ?I think we shouldnt let our studies be influenced. We should learn the advantages of a word, do not lose ourselves. Because we are unique and we can only become ourselves. We should just do ourselves best, we must believe ourselves so that we can achieve our dreams.

作文事例英语初中范文 第十二篇

English is important and useful to us. How can we learn it well? Here are my suggestions.

First, we should often listen to the tapes, English songs and programs. Watching English movies is also helpful to us. Second, we should speak English in class as much as possible. Don’t be afraid of making mistakes. The more you speak, the fewer mistakes you’ll make. Wed better join the English club and practice with others. Third, we can read more English newspapers and magazines. It’s good for us. At last, we should recite some good passages and keep diaries.

In a word, as long as we do more listening, speaking, reading and writing, we will learn English well.

作文事例英语初中范文 第十三篇

I traveled to Beijing with my parents during the May Day holiday. We went there by train. It was wonderful. We visited many places of interest, the Great Wall, Tian’anmen Square , the Palace Museum and so on. I took many photos and I bought some presents for my friends. (The people there were very friendly and the food was delicious.) We stayed/were in Beijing for a week. We had a good time there. (I want to go there one day again.)

My Plans for the Summer Holidays

The summer holidays are coming. I can do many things during the holidays. Here are my plans for it. First, I want to study math, because my math is poor. Second, I plan to help my mother do some housework. I can do some washing and cooking. Third, I hope to travel to Beijing. I want to visit the Great Wall and the Summer Palace. I think I can have a good time.

作文事例英语初中范文 第十四篇

Love is the most beautiful language in the world. We can wipe our tears away when we cry. It can bring happiness to us when we feel lonely. It can even give us confidence when we have problems. I often listen to some pop songs, and most of them are about love. The singers sing these songs loudly. I think that’s very real. They express their feelings directly. It shows that they love.

The happiness of loving and being loved is very wonderful. Let’s try to love each other so that the world will be full of love.

作文事例英语初中范文 第十五篇

English is important and useful to us. How can we learn it well? Here aremy suggestions.

First, we should often listen to the tapes, English songs and English movies is also helpful to us. Second, we should speak Englishin class as much as possible. Don’t be afraid of making mistakes. The more youspeak, the fewer mistakes you’ll make. Wed better join the English club andpractice with others. Third, we can read more English newspapers and ’s good for us. At last, we should recite some good passages and keepdiaries.

In a word, as long as we do more listening, speaking, reading and writing,we will learn English well.

作文事例英语初中范文 第十六篇

My classmates and me

Hello everyone!I'm Bai classmates and teachers have helped me because I came here.

In my life,many classmates are very friendly for they brought me delicious and tasty food from their weekends,they and I visited our beautiful and funny school,they ofen play basketball or football with me at the like taking with a result,I am good with them,too.

In a word,I hope our life will be better like my classmates.

作文事例英语初中范文 第十七篇

Our side of carbon emissions

Britain's new scientist magazine reported that from to , global textile output from million tons to million tons. The "fast fashion" trend of textile production and consumption surged cheaper, consumer lost through it several cheap clothes normally with artificial materials, they are synthesized from petroleum chemical raw materials, in the process, the consumption of energy and emissions of greenhouse gases than natural fabric. Also, the artificial materials difficult to recycle use,degradation also needs a long time.

According to data from the % of greenhouse gas emissions from the exhaust of data to explain about the "food" of carbon emissions is how important. In the meat consumption, cattle produce greenhouse gases is one of the most, In addition, the production of feed and livestock farms to discharge waste also will release a large number of greenhouse gases. German health magazine reported that thirty percent of calories come from red meat if the the cold of winter, building heating system will consume a large amount of energy. According to the British broadcasting corporation reported that over the next three years more than sets of social welfare house will be built in Northern Ireland.

作文事例英语初中范文 第十八篇

随着我们长大，和家人围坐在一起吃饭的时间越来越少。研究表明，跟家人一起吃饭有助于身体健康。对此你有何看法？你又是如何做的？请以Eating with parents makes you healthier为题写一篇短文陈述你的理由。

Eating with parents makes you healthier

I believe eating with parents will make teenagers healthier.

First, as we know, a happy mood keeps people healthy. Talking more with parents is a better way of helping solve problems in our daily life. The dinner time is just a chance for communication.

Also, home-made meals are healthier for us to eat, for the food problem seems more and more serious now.

As for me, I have dinner with my parents every day. My family all think the time for dinner is the most important moment for each of us.

作文事例英语初中范文 第十九篇

On New Year's Eve，our class had a party. The atmosphere was good. It was out of the ordinary from the very begining. The boy student from one bedroom gave an unusual performance. We saw a boy named Li Xinmin turn off all the lights in a sudden snap. Then with three resounding（响亮的） crow of a cock echoing in the hall，the hall was again brightly lit in a snap.

Then，the representative of the bedroom Zhu Guozhang asked us to guess a line of a poem related to the above situation. He added that Li Xinmin alone was born in the year of the dog and the other three were all born in the year of the chicken. They left us all in confusion. And it was our monitor who was quickwitted（机智的）。 He shouted our“The day breaks as the cock crows three times at dawn.” The hall After that，they had another item. This time Li Xinmin was placed in the middle of the circle. While he was standing there，the other three stood around him，each bowing down to him at an angle of 120 degrees. It was an idiom. This time I got it right：“The dog stands out among a group of chickens.”

作文事例英语初中范文 第二十篇

Chinese New Year is coming and my family is very busy. It s because ChineseNew Year is very special and important. We must prepare many special things toget ready for this festival.

First, will make a big New Year meal. Second, we will make Good-luckwishes. Third, we will set off firecrackers. New Year meal is delicious and wethink that eating some will bring us good luck. A long time ago, Chinese peoplebelieved red color could bring our good luck too. And we set off firecrackerscould frighten ghosts away.

Chinese New Year is very popular between students. Because we can have along happy holiday.

作文事例英语初中范文 第二十一篇

I have many habits,music is my favorite love pop music and I always listen to PM3 to enjoy pop on my way home or school.

Also, I am a good singer and I can sing a lot of pop songs.

I love music becose it can brings me happies, when I was unhappy music could comfort me, when I was happy music also could make me happier.

I usually play guitar for 30 minutes after dinner. Sometimes I go to love music.

作文事例英语初中范文 第二十二篇

Dear Peter,

Hi,I am am you best friend. l hear that you are in our Chinese culture,so I invented you join confusioninstitute.

At the beginning of,l will sound you join confusion institute for youhappy.

Secondly, confused Institute including major Charities is is theoldest world thinks and think a human being should kindness and hopeto peace,he has many think studying mix to and morethinks. I will sent you to the email, I hope to for your hhelp.

Nowadays, there are more and more confucius Institute, it's important tolearn Chinese culture.

As far as I know,many people join confucius Institute,I hope you take holdof the chance.

Finally, I am looking forward to your come and letters.

Yours sincerely,

Lihua

作文事例英语初中范文 第二十三篇

The winter vacation passed quickly. In those days， I have done some things. Playing， doing homework and so on. Sometimes I helped my mother doing some housework. She thanked to me.

Though， I was proud of myself. I also went over my English learning. I think I have known more than before. In the new term， I will study hard.

寒假很快就过去了。在那些日子里,我做了一些事情。玩,做作业等等。有时我帮我妈妈做一些家务。她向我表示感谢。

不过,我为自己感到自豪。我也走过去我的英语学习。我想我已经知道比以前更多。在新学期,我将努力学习。

作文事例英语初中范文 第二十四篇

I like to make friends. Thus, coming to the new environment, I am so eager to meet cool people here and be friends with them. Li Mei is my good friend, she is a really nice and cool girl. The first time I met her, she was having argument with others, because a young man did the rude things to the old man. She blamed the young man for not apologizing to the old person. I admired her courage and made friends with her. I found she could give the creative idea about hot issues. Her difference makes her stand out. I cherish our friendship.

作文事例英语初中范文 第二十五篇

Summer holiday is you got any plans for this coming holiday.

If we haven,t got any,let me tell you my plan.

I will get up at eight oclock I will listen to the pop music when I am that ,I will play the computer games with my friendsIt’s time for lunch.

I will have the lunch in three minutes,and then go out for class.

When the class is over,I will continue playing the computer games with my friends and do my homework.

作文事例英语初中范文 第二十六篇

新华学校实施了改善学生健康的“蛋奶工程”。Wet Hua是该学校的一名学生。这天，Wei Hua 又得到了刚发下的鸡蛋和牛奶。他打开那盒牛奶喝了一点点，就不想喝了。连续吃了一段时间的牛奶和鸡蛋，Wei Hua感到吃腻了，就偷偷地把鸡蛋和大半盒的牛奶扔进了垃圾桶里。远处的王老师看到了他的举动，并对他进行了教育。他对此感到抱歉，决定今后要节约粮食，不再浪费粮食。

参词汇rubbish bin垃圾桶， be tired of 对感到厌（腻）了，throw扔， save节约

To improve students health Xin Hua Middle School has carried on the Milk and Eggs Project for students Wei Hua is a student at the school Today Wei Hua got the milk and egg again as usual He opened the box of milk and drank a little He felt tired of the egg and the milk He didnt want to have them any more Then he threw the milk and egg into the rubbish bin At that moment Miss Wang saw this from far away She came over and told him not to do this again Wei Hua felt sorry to do so He promised not to waste food any more

作文事例英语初中范文 第二十七篇

I love to read. When I was three years old, my parents had taught me to read. They bought me some books with funny and colorful pictures. Soon I was attracted by these stories and fell in love with reading. Since I went to school, I often went to the library and it was my favorite place. Studying in the library provided me a silent environment. The most important thing was that as so many excellent students sat around me. I felt the great motivation to move on. I could find the data any time and read the books I liked. I have gained a lot of knowledge and find the great hour there.

作文事例英语初中范文 第二十八篇

one day my classmates and i went to the park to do some volunteer labor,which was to weed the park.

While we were doing that, a lot of turists passed by us, looking at uscuriously. And even some of them came up to ask what we did that for and howmuch we were paid for that. Some of us students were shy to answer thosequestions.

However, in my opinion, we should aswer those questions so proudly that wedid this for nothing but just for the beauty of our park, our city, our country,and even our world.

In our country everyone is trying to do something to help the developmentof city and whole social civilization.

What we have done is just a little and how I feel happy that we can dosomething helpful to the society.

作文事例英语初中范文 第二十九篇

多数父母希望孩子将时间花在学习上，以便有个美好的未。因此父母只关注孩子的成绩，不让孩子做与学习无关的事情，例如，不让孩子做家务等。请你就“孩子应该如何成长”这一话题，简单描述父母的想法和自己的观点。

提示1、父母的想法；2、你自己的观点； 3、词数80左右（首句已给出，不计算在总词数内）。

Parents wish their children to have a bright future so they pay much attention to their study After school they dont allow their children to do anything except study.

I know parents love us and what they do is for us Although its our duty to study its not only thing for us to do There are many things for us to learn and we want to know more about the outside the world We should not only take exercise to keep us healthy but also read more literature books So I hope our parents can give us more time to develop our hobbies.

作文事例英语初中范文 第三十篇

Nowadays, many people more and more worried about the food safety because there have been many food safety problems in the world. How to eat safety? Here are many suggestions.

First, we had better eat at home and try not to eat outside because roadside food is very dirty. Second, we should cook the foods properly because some uncooked foods are good for us. Third, it’s safer to buy foods with QS signs because there’s always something wrong with most of the foods without QS signs.

If you can follow these suggestions, I think you can eat healthy.

作文事例英语初中范文 第三十一篇

Since I go to middle school, I found the lifestyle is so fast that I have to study much harder. Before, I would go shopping or playing sports with my friends after class. At night, I would watch TV or chat with my friends online, but now, the situation has changed. In the day time, I have to sit in the classroom to study so many subjects and at night, the homework takes up my whole night. I start to feel stressful. I realize that I need to get used to the new life. If I can improve my study efficiency, I can make out some time to have fun.

作文事例英语初中范文 第三十二篇

Last Sunday, Zhou Hua went to the movie. At the gate of the cinema, he saw a girl crying. So, he went up and asked what was wrong with her. The girl said she couldn ’t find her mother. After that, Zhou Hua took her to the nearest police station.

When they entered, the girl saw her mother speaking to a policeman. How excited the girl was! At last her mother and the policeman thanked Zhou Hua very much. Although Zhou Hua was late for the movie, he felt very happy.

作文事例英语初中范文 第三十三篇

I would like to thank you for all the help you gave me during this past semester. You were alway so patient when I asked you questions.

You listened to them carefully and explained everything so thoroughly. You showed me different ways to practice and remember new words and usage.

I felt so encouraged and became more comfortable in speaking English. You made the excercise so interesting that I was always very eager to participate and practice.

My English has improved so much. How could I thank you enough?! I cannot wait to take your class next semester and keep working on my English.

作文事例英语初中范文 第三十四篇

In my opinion，the Internet is helpful rather than harmful as someone else thinks. As is known to all，the Internet is playing a more and more important part in our daily life. On the Internet，we can read news at home and from abroad and get as much information as we can. We can send e - mails or make phone calls to our family as well as to our friends. We can also attend the net school，read many books and even teach ourselves English. We can also enjoy music，watch matches and play computer games on the Internet. We can even do shopping on line. Besides，we can improve our ability to operate the computer.

But we should not be given to the Internet，or we'll get our life and study destroyed. Besides，we should keep off the harmful websites. Anyhow，this doesn't prevent the Internet becoming our friend. We can't throw away the apple because of the core，can we?

作文事例英语初中范文 第三十五篇

Most children have read many fairy tales when they are small. Parents will read these stories to them before they sleep. Many fairy tales describe a pure world and teach the children to be a nice person. But for some stories, I find the value is not favored today. For example, the story of Cinderella. It is known to all that she is rescued by the prince and lives a happy life. The story is a little negative for Cinderella, because she doesnt make any effort to change her situation. She is waiting for someone else to make her out of the trouble. For now, we are advocated to fight our dreams, because success will not come easily.

作文事例英语初中范文 第三十六篇

Recently, “clearyour plate” campaign is more and more popular in society, which advocates saving against wasting. The campaign draws our attention to wasting on students are noticed to throw away a lot of food in the canteen. As is often the case, some lights are still on with nobody in classrooms. What’s more, many a student spends much money buying unnecessary items. As far as Iam concerned, it’s high time that we fought against wasting. Here’re my suggestions. Firstly, I think our school should carry out various activities to arouse students’ awareness of saving. Secondly, relevant rules and regulations are supposed to be made to punish those who waste things. Most importantly, we should form the habit of saving from now. It is everybody’s duty to save resources.

近日，“清洁你的盘子”行动在社会上越来越流行，提倡节约反对浪费。运动让我们注意到了校园浪费。一些学生发现扔掉很多食物在餐厅。通常情况下，一些灯还没人在教室。更重要的是，许多学生花很多钱购买不必要的物品。 至于我，那时候我们反对浪费。这里是我的建议。首先，我认为我们的学校应该开展各种活动，激发学生的节约意识。其次，相关法规应该惩罚那些浪费的事情。最重要的是，我们应该养成节约的习惯，从现在。节约资源是每个人的责任。

作文事例英语初中范文 第三十七篇

Many years ago, bike was very popular among teenagers, but as the development of economy, few kids ride bike and most of them are driven to school by their parents. Recently, as the Ofo comes into the market, which reminds of people the simple lifestyle. A lot of people ride these yellow bikes on the street. What a beautiful picture. I love riding bike so much. It is such leisure. I can do the exercise, at the same time, I can appreciate the scenery. Sometimes riding bike makes me feel like in the movie, enjoying the leisure lifestyle as the heroine. No matter how the world changes, I think bike will be part of my life.

作文事例英语初中范文 第三十八篇

I have a very beautiful cat. Its colour is white and yellow. Its name is Haahua. I think it is my favourite cat.

我有一只非常漂亮的猫猫。它的颜色是黄白相间的。它叫Haahua。我觉得它是我最爱的一只猫猫。

She likes playing with the bell. She loves catching mice. Though it is a kind of animals, I treat it as my friend. Sometimes I give her some fish or pork to eat. She looks like a fool when she meows. Wherever I am walking, she follows me.

她喜欢玩铃铛。她爱抓老鼠。尽管它是动物，我把它当成我的朋友。有时候，我会给她吃一些鱼肉或猪肉。当她“喵喵”叫时，她看上去傻乎乎的。无论我在哪里散步，她总是跟着我。

How happy I am! How nice my friend is! I love her more and more.

多开心的我呀!多棒的朋友呀!我越来越爱她了。

作文事例英语初中范文 第三十九篇

Students to protect their teeth it is necessary to do the following: Usually pay attention to dental health and protect teeth. Usual to eat less candy. In particular it is not candy bedtime to prevent dental caries. In addition attention should be paid to health habits usually do not bite finger do not bite a pencil top foreign body the teeth do not lick the tongue.

学生要保护好自己的牙齿，就必须做到以下几点：平时注意牙齿健康，保护牙齿。平时少吃糖果。特别是，它不是糖果睡前预防龋齿。另外，平时要注意健康习惯，不要咬手指，不要咬铅笔顶端异物，不要舔舌头的牙齿