一带—路初中英语优秀作文（精品20篇）

有一种动物十分可爱喜欢吃竹子——它就是熊猫。下面语文迷网整理了描写熊猫的英语作文范文，供大家阅读。

【篇1】熊猫的英语作文

Hello everyone! have a kind of animals is very cute he likes eating bamboo and living in China. Its panda. It has a pair of black rim of the eye, are black and white. It in this lifetime biggest wish is have no black rim of the eye, eating bamboo. What a color photos. I quite like pandas, because they are very

【篇2】熊猫的英语作文

Giant pandas are Chinas nationaltreasure.

They live in SiChuang province and Gansu province in China.They have black and white fur.Their eyes are big and they are fat.We love them very much.They like eating bamboo.They can climb trees and swim.

Now,there are only about 1000 giant pandas.So we must try our best to protect them.

【篇3】熊猫的英语作文

Panda is one of the scarcest animals. People in the world like it very much. There used to be many pandas in China long ago. As the balance of nature was destroyed and the weather was getting warmer and warmer, pandas became less. But at present, the number of pandas is increasing year by year. There are now so many pandas that some are being sent to other countries so that people there can enjoy them.

Nowadays, the biggest nature park for panda in China is in Sichuan. There is a research centre for nature and wild life there. Scientists hope that one day they will have enough pandas to be set free and let them live in the wild again.

Not long before, my sister called me, she said she would be married during Spring Festival, I was so happy for her. In the wedding, I took the video, I recorded down the beautiful moment.

In my heart, my sister was just like the small girl, we played jokes on each other, I thought about our childhood time. How time flies, now she was married, she would be a mother soon.

I felt so moved, watching her growing up, I was happy for her, too. She has stepped into the new chapter of her life. I wish her all the best, I believe she will be happy forever, I am so lucky to witness her great moment.

不久之前，我的姐姐打电话给我，她说她将要在春节期间结婚了，我为她感到高兴。在婚礼上，我录影，记录下了美丽的瞬间。在我的心里，我的姐姐就犹如一个女孩，我们彼此开玩笑，我想起了我们的孩童时光。时间过得真快啊，如今她已经结婚了，她也将要成为一名母亲。我很感动，看着她长大，我也为她高兴。如今她已经进入了人生的新篇章。我给予她最美好的祝福，我相信她会一直幸福，我很幸运目睹了她的重大时刻。

[初中英语作文：我姐姐的婚礼

MyPet

Recently, three owls appeared suddenly on our campus. They made me think of my pet from childhood. When I was little, we had an owl at home. It was small, gray, and had two big eyes. We liked it very much. Every time I went home, it greeted me by making “goo-goo” sounds. We always played with it and talked to it. It would blink its eyes just like it understood what we were saying. It was like my best friend. But when the weather became colder, we forgot to keep it warm , and it died. It made us sad for a long time, and it also taught me how important it is to take care of animals.

[我的宠物初中英语作文

When we watch TV, there are so many beautiful models, wearing beautiful dress with their skinny body, they are sending out such message that if you are skinny, you’ll be looking gorgeous just as them. Affecting by the trend, young people loose weight by no means.

当我们看电视的时候看到很多漂亮的模特，纤瘦的身材，穿着漂亮的衣服，他们在发出一种信息，如果你纤瘦，漂亮的衣服，他们在发出一种信息，如果你纤瘦，你也会看起来像他们美丽。受潮流影响，年轻人不惜使用一切方法来减肥。

On the one hand, some young people lose weight by taking medicine, even eat no food. The ads are always leading the young people to the wrong thought, they tell people that they can loose weight quickly by taking some pills, which are doubted by the doctors. In order to look as the movie starts, people even reject to take food, they eat fruit and fight against hunger.

一方面，一些年轻人通过服药减肥，甚至不进食。广告总是让年轻人产生错误的想法，广告告知人们可以通过服药来快速减肥，这是被医生怀疑的。为了看起来像电影明星一样，人们甚至拒绝进食，吃少量水果，和饥饿做斗争。

On the other hand, some young people keep the clear mind, they make themselves look perfect by doing exercise and keep balanced diet. Their purpose is not looking as good as movie starts, but for keeping fit. They don’t believe in the ads, they believe that lose weight not properly will hurt the body, so they pay special attention to the health.

另一方面，一些年轻人保持清醒的意识，他们通过运动和平衡饮食来让自己看起来完美。他们的目的不是为了像明星一样好看，是为了保持健美。他们不相信广告，相信不适当的减肥会导致身体受害，因此他们特别注重健康。

Loosing weight is hard work, even dangerous thing, if we are so blind to loose weight, we will lose our life. Young people should take care to the healthy way.

减肥是艰辛的工作，甚至是危险的事情，如果完美盲目减肥，会丢掉性命。年轻人应该注重健康的方法。

[初中英语作文年轻人减肥的态度

I am like a rickety boats and ship in the ocean of knowledge in, almost cant find any knowledge of the pearl. And the teacher like an experienced mentor, guide me into light waters.

How many night, whether it is a sunny sky, or the north liUxue86.com wind shout, your room is always reveal a narrow beam of light. You for our quarrel, you happy, for us a little bit of progress every move you do, you say every word, is for us and our future.

The teacher taught us not only knowledge, but also the true meaning of life: people without health, let alone learning, more not as something different. So, we must not to pursue a minor, and delayed the most important, of course, important good, minor or want to pursue.

Who is vomiting for us through the blood, wire is who died for us to try? He had a cordial and loud title - a teacher!

我就像一艘摇摇摆摆的小船，在知识的海洋里乱荡着，几乎找不到任何知识的珍珠。而老师就像一位经验丰富的导师，指引我向光明的海域划去。

多少个夜晚，无论是星空晴朗，还是北风呼呼，您的房间总是透露出一束微弱的光。您为我们的争吵而烦恼，您为我们一点点进步而高兴，您做的一举一动，您说的一字一句，都是为了我们与我们的未来。

老师教我们的不仅仅是知识，更是人生的真谛：人如果没有了健康，就谈不上学习，更加谈不上有一番作为。所以，我们不可去追求一个次要的，而耽误了最重要，当然，重要的不错了，次要的还是要去追求。

是谁为我们呕心历血，是谁为我们春蚕到死丝方尽?他有一个亲切而又响亮的称号——老师!

I have a lovely family and my families live a happy life. My mother is a farmer.She is fat,but she is beautiful.She has big eyes,a small nose and a small mouth.She is very kind and clever, so she has many friends and she is welcome among my neighbours. My father is a worker. He works long time a day and comes home late. He is always tired.But,my mother often cooks delicious dishes for him and that makes him happy and moved. As for my mother, she regards it as her happiness. I love my parents, although we do not live a rich life, but we are satisfied.

Since I went to school, I spent a lot of time in study. My classmates and

teachers are just like my families. We almost meet each other every day. My

teachers help me a lot. When I meet problems in study, they are very patient and

help me to figure out the answers. When I have trouble in getting along with

other students, they will talk to me and comfort me. I am so thankful to them,

because they care about me just like my parents. I respect them so much. In my

heart, they are the great people. I must study hard so that I can return their

love.

Shopping online is quite popular in our daily life now. It is a new way of shopping. Many things are offered and wait for your choosing. Convenience is the most important advantage. You can buy anything as you like. You don’t have to queue with other shoppers. Meanwhile, it is often open for 24 hours a day.

However, there are many disadvantages about shopping online. You can’t actually see the real products. So you may be cheated easily. Also, many people will miss the best opportunity to get along well with their friends and share the joy of shopping.

In conclusion, we should make proper use of the internet shopping.

译文

网上购物在我们的日常生活中很受欢迎。这是一种新的购物方式。很多东西都提供了，等待你的选择。方便是最重要的优点。你可以随意买任何东西。你不必和其他购物者排队。同时，它通常每天开放24小时。

然而，网上购物有许多缺点。你真的看不到真正的产品。所以你可能很容易受骗。同时，许多人会错过与朋友相处的好机会，分享购物的乐趣。

总之，我们应该好好利用网络购物。

The annual Chinese New Year came in 20xx, the Spring Festival has come exceptionally busy, it is accompanied by the festive sound of firecrackers, sky in full bloom, and colorful fireworks came. The ancients as "firecrackers of the year" to commemorate Chinese New Year. The return of fireworks and firecrackers, so that the ancient city of Beijing is full of a thick smell of years, sound of firecrackers brings us endless joy, filled with a wonderful interesting traditional festivals.

As a girl, I do not like to put those little on the "crackling" sound of Mei Wan and loud firecrackers. I like those colorful light emitted after, four run around fireworks. There is a called channeling smallpox, a carefully ed in the ground began to release, and later on the secure enough to put in the hand grip, lit "squeak" is heard, a group with a small ball of fire flew up into the sky, screaming, "pit" Suddenly the sky on a flower in full bloom out, quite exciting.

My favorite is called Setaria fireworks in one hand and a lit continuously emitted after the bright, constantly changing colors of the fireworks. My hands turned, arms on the emergence of two very nice Ring of Fire; my arms open, 4 running, I became a "Firebird." I have a another one to lying, I cried, ran, happy with Chinese New Year fireworks is a traditional custom. Legend of the so-called "year" is an evil beast, people set fire to bamboo, the sound of bamboo bursting scared off "year", "years" away is the Chinese New Year in.

I like fireworks, it made me able to live a traditional feature of the year. I think as long as we pay attention to safety, stressing civilization, this tradition will be able to have a wonderful New Year.

[描写春节的初中英语作文

Spring Festival ,known as the Chinese New Year,is the most important

holiday in China.From late January to early February,Chinese people are busy

preparing for the New Year.They clean their houses ,have their hair cut,and buy

new clothes .Jiaozi or dumpling is most popular.To those who live far away from

their home,this festival is also a framily reunion occasion.

And they often go back home to celebrate the festival with their family.The

first day of the new year is the time when people visit their friends adn wish

each other good luck in the new year.

My family has a naughty puppy.

The dog with a golden hair, a pair of round yo eyes, a pair of ears vigilant listening to all the suspicious sound around. The puppy is also long with a pair of sharp claws, the tail erected tall, it is very arrogant. Puppies are also very ferocious, as long as a little to hear what or see what will be issued a "warning", do "fight" ready.

My dog is not only naughty, but also very rich sense of music.

One day, I am free to do nothing, they put the music. Who knows, the dog heard, the bones are not eating, and immediately came to the tape recorder. I guess, maybe the puppy found that the music came from the tape recorder! The dog in the recorder next to the squat, while listening to music, while the rhythm of the music with the tail to shake over the past, really like a small music Home in command of the band ...

The puppy is particularly fond of biscuits. I take this opportunity to catch the puppy as a fish. I first took out a slender bamboo, and then with a line in the other end of the bamboo, and then a piece of milk pull flowers biscuits tied to the other end of the rope, made a "fishing rod." I walked past the biscuits, and made the puppy dazzled, I suddenly stopped shaking, the biscuits hanging in front of the dog, the dog immediately soared to the biscuits, I went to the dog behind the biscuits, Let it rush empty. So it lasted for several minutes. Puppy pretend to "retreat", I immediately relaxed vigilance, who knows the dog quickly turned to bite biscuits, thanks to my reaction fast, puppy biting line. I would like to pull back the line, then hard pull, but I am more energetic, the dog pulled the more tight, I thought: it seems not storm, can only take. I stopped the "attack", the dog thought I surrendered, they are kindly ready to enjoy the biscuits, I take advantage of this opportunity, forced a pull, the biscuits back to my hands ... ...

This is my home naughty puppy, do you like it?

After a happy winter vacation, the new year began again. We all gathered together and talked happily about the interesting news in the winter vacation.

All of us have fun and laugh. We cant forget the good time of the new year. New years Eve, as usual, fireworks day, we also say that all sorts of gossip to play their own fireworks, a long pole fireworks blooming like chrysanthemum, such as bright pearl of a large fireworks, little and dainty broken beads...... Jiang Zehong is talking about, he has never seen everyone "Fu" big fireworks, called "big fortune". The "Pi" with a bang, a fireball into the sky, "Mao Ba Ba" fried into a big red shining "Fu". After a while, the word "happiness" has become a meteor, dancing posture, he slipped to the door, just like a large fortune, the dog wangwang! Lets listen to the itch in our heart, and we want to have a look.

On the eve of the new years Eve, for the year, there must be little money. Wang Yi people engage in innovation, the red gifts are hidden. Wang Yi had to turn the house down to the sky and search one by one, not a small corner. Pays off, Wang Yi people find their red envelopes gift in the kitchen, balcony, room finally. Li Yans mother-in-law is the most fond of Li Yan, the stuff in the plate, and the most money for her. Li Yan is also very love her mother-in-law, not only sensible and well behaved, and flattering, before leaving, dont forget to wish small mother-in-law: "good luck, longevity, happiness as immense as the Eastern Sea, everything is well, the dog wangwang!"

The breath of the country is thicker than the city. When Zou Jianing burned incense in a country temple, he was lucky to see a lion and a dragon. I saw the lion majestic-looking, yaotouhuangnao, vivid, it stared at the headlight gun like eyes, went to the east to the West in the jump, is pleased to run wild. I do not know what time from the lions sprang out of a dragon, it was glittering, restless dragon flying up and down, the two. With the sound of drums, dragon and lion gradually walked away. But its fresh enough for the children we grew up in the city.

There are many interesting things during the winter vacation, Li Tian heap a snowman full of personality. Huang Yuanhao put a big kite of one meter long. Zhu Zhendong fished the fish patiently. Yao Qing made a new house at his uncles house. Jiang Danwen wanted to dig the shepherds purse, dug a basket of wild herbs...... The happy winter vacation is over. It is sure that this summer vacation will have more interesting things to happen.

度过一个愉快的寒假，新年又开始了。大家又都聚在一起，兴致勃勃地谈论起寒假生活中的趣闻。

大家津津乐道，有说有笑，对过年的美好时光久久不能忘怀。除夕夜，照例是放烟花爆竹的日子，大家也七嘴八舌地说出了那天自己玩的烟花，有绽开似菊的长竿烟花，灿烂如明珠般的大礼花，小巧玲珑的碎珠……姜泽宏更是侃侃而谈，原来他放了个大家从未见过的“福”字大礼花，叫“大福临门”。那随着“噼叭”一声巨响，一团火球窜上了与天空，“噼哩叭啦”地炸成了一个大红色的闪耀着金光的“福”字。过一会儿，这个“福”字又变成了一颗颗流星，舞动着身姿，向他家门口滑落，还真像大福临门，狗年旺旺！听得我们心里直痒痒，也想放个看看。

过除夕，拜大年，肯定少不了压岁钱。王苡人家搞了个创新，把红包礼物都藏了起来。王苡人只好把家里翻个底朝天，逐一逐个地搜寻，不放过一个小角落。皇天不负有心人，王苡人终于在厨房、阳台、书房里找到了自己的红包礼物。李燕的小婆婆最疼爱李燕了，压岁盘里的东西随便挑，给她的压岁钱也最多。李燕也很喜欢她的小婆婆，不仅懂事乖巧，而且讨人欢心，临走时，还不忘祝小婆婆：“福如东海，寿比南山，吉祥如意，万事顺心，狗年旺旺！”

乡村的过年气息比城市还浓。邹佳凝在乡下的寺庙里烧香时，有幸看见了舞狮、舞龙的人群。只见那狮子威风凛凛、摇头晃脑、活灵活现，它瞪着大灯炮似眼睛，窜到东跳到西，犹如在高兴地撒野。不知从什么时候狮群里窜出了一条龙，它浑身金光闪闪，好动的龙上下翻飞，来了个二龙戏珠。随着敲锣打鼓的声音，龙与狮群渐渐走远了。不过，这对我们在城市里长大的孩子来说是够新鲜的。

寒假里还有许多有趣的事，李恬堆了个个性十足的雪人。黄苑皓放了个一米多长的燕形大风筝。朱振栋耐心地钓了次鱼。姚庆在舅舅家闹新房。姜丹雯本想挖荠菜，结果挖了一蓝子的野菜……愉快的寒假结束了，想必今年的暑假也一定会有更有趣的事发生吧！

in this holiday l was very happy.why? because my famliy go to beijing.we saw tiananmen.the sky was blue ,tiananmen was red and yello.it is very nice.then i played with my mother and father in xiangshan.in the afteroon we went to yuanmingyuan.

look at yuangmingyuan, i was very sad.in the evering we ate some litto food.

beijing was very big.i love it very much.

Dear Frank:

Long time no see. Howare you recently?

I am very happy toreceive your letter and glad to hear that you will come to my city and staywith us for a few weeks. My house is on theHeaven Streetwith five rooms, one ofwhich is living room, two bed rooms, the other two are kitchen and bathroom. Ihave cleaned a guest room for you. There is a bed, a sofa and three chairs inthis 25 square-meters room. If this room is not suitable enough, please writeto me and I will prepare another one for you. There is a bus stop near myhouse, and you can take number 1 bus to the cinema, number 2 to the supermarketin where you can always choose the commodities you need.

If you have otherrequests, please feel free to write to me. I will try my best to meet yourneeds. I wish you can come soon and have good days here.

Sincerely yours,

Jaz

亲爱的富兰克

很久没见到你了，近来怎么样？

我很开心收到你的来信，听到你将要来我这里和我待几周我很高兴。我家住在天街，有五个房间，其中一个是客厅，两个卧室，另外两个是厨房和浴室。我已经帮你把客房打扫干净了。这个25平米的房间有一张床，一张沙发和三把椅子。如果这间放不合适的话请写信告诉我，我会给你准备另一间。我家附近有一个站牌，你可以乘坐 1路去电影院，2路到超市，在那里你可以买到你需要的商品。

如果你还有其他要求，请随时写信告诉我，我会尽量满足的你需求。希望你能快点来这，在这里度过愉快的日子。

杰斯

[初中英语作文给朋友的回信

Recently, we have little time to keep close contact with nature. We spend

too much time on study or working. We almost forget that how green the grass is,

how beautiful the flowers are, and how sweetly the birds are singing outside our

windows. A saying goes, "All work and no play makes Jack a dull boy". It means

that we need to relax ourselves and go out to breathe more fresh air. We can

also climb a hill in the suburbs.Its good for our health.

Lets go outing.

MyfavouriteteacherisMissHuang.Sheisabeautifullady.Shehastwobigeyes,ahighnoseandalittleredmouth.Thereisalways

asmileonherface.

MissHuanglikessingingandcollectingposters.Sheisgoodatplayingthepiano.Intheevening,shealwayssitsinfrontofthepianoandplaysnicemusic.Sheisgoodatdancing,too.Sometimessheteachesusdancing.

MissHuanglikesdogsverymuchbecausethedogisveryfriendlyandcute.Herfavouritecolorisblue.Becauseblueisthecoloroftheskyandthesea.

Thisismyfavouriteteacher.Ourclassmatesalllikeherverymuch.

译文：

我最喜欢的老师是黄老师。她是一位漂亮的女性。她有两只大大的眼睛，一个高高的鼻子和一张小小的红唇。她的脸上总带着笑容。

黄老师喜欢唱歌和收集海报。她钢琴弹得很好。晚上，她常常坐在钢琴前弹奏优美的乐曲。黄老师跳舞也很棒。有时她也会教我们跳舞。

黄老师非常喜欢狗，因为狗很友好也很可爱。黄老师最喜欢的颜色是蓝色，因为蓝色是天空和海的颜色。

这就是我喜欢的老师。我们班的同学都非常喜欢她。

As the drawing presents, there is a man walking across the street

absorbedly focusing on his cell phone without noticing the surroundings. This

sort of phenomenon is not uncommon and rare in some metropolis, especially among

the youngsters.

What the picture illustrates is the prevailing situation that has long

existed in todays China. That is the mobile phone obsession. With the advent of

information age, people are becoming

increasingly fascinated on the electronic products, especially the cell

phones. Not surprisingly, you could easily notice that most of us are obsessed

in sending messages, playing online games with their mobile phones. It cannot be

denied that this phenomenon may negatively impact the relationship among people,

and therefore they will become estranged and isolated.

Personally, in view of the overuse of mobile phones, I hold that we

individuals should raise the necessary awareness that good relationships are

reinforced by sincere and face-to-face communication.

I have always had a wish in my heart, which is to go to the sea. This summer holiday, July 25, afternoon. We went to the changzhi railway station and sat down to the sun. The sound of the sound train slowly disappeared into the horizon.

On the train I saw the tall of taihang mountain, the Yellow River, the spectacular, sat for 7 hours, we finally come to rizhao railway station, the train get off a hot muggy, I know that I have come to rizhao.

Leave me the deepest reflected in sunshine is square, we went to the square, flew under the waves in the breeze of show more beautiful sea, it is really so beautiful sea grand, turbulent waters under the sway of sea breeze, contemplating the spirited, Mercedes, growled, rolled towards the shore. In rows of sea water, the waves of spray, and the thousands of beads of water, are sent to the sea. At this time. I admire the fact that the ancients could write such phrases as "the waves of the waves, the thousands of snow." I left 10,000 square beaches.

Seafood in the afternoon, we went to the supermarket, smell I go in I hate seafood flavor, under the advice of family I just know some seafood is delicious, I ate a lot. The suns seafood is cheap for 50 yuan for a 5 yuan sunshine.

In the two days of sunshine, we went to the sea by the sea. The journey is short but the scenery is always in my heart.

我心中一直有一个愿望，那就是去大海边看看。今年暑假的7月25日，下午。我们来到了长治火车站，坐上了到日照的专列。随着呜~呜~呜~的声音火车慢慢的消失在了地平在线。

在火车上我看见了太行山的高大，黄河的波澜壮阔，坐了7小时的火车我们终于来到了日照火车站，一下车闷热闷热的，我知道我已来到日照。

在日照给我留下最深映现的是万平口，我们到了万平口，哗哗哗的海浪在微风的吹拂下显的海更美丽了，那真的是太美了大海的气势恢弘，汹涌的海水在海风的吹拂下，似群群烈马，奔驰着，咆哮着，向岸边卷来。一排排海水，激起如雾的浪花，化做千千万万的水珠又汇向大海。此时;我真佩服古人能写出“惊涛拍岸，卷起千堆雪”这样的绝句。我依依不舍的离开了万平口海滩。

下午，我们来到了海鲜超市，我一进去就嗅到了我最讨厌的海鲜味，在家人的劝阻下我才知道有的海鲜好吃，我一口吃了一大把。日照的海鲜很便宜长治50元的日照买5元。

在日照的两天，我们在海边赶海。捕小鱼，行程虽短但，但美景却常绕在我心中。

Everyone always has a good Sunday. On Sundays， everybody does some things what he like.

Last Sunday， Jack had a relaxing Sunday. He got up 6 o’clock. After breakfast， Jack played basketball with his friends. They were very happy. Then he played the guitar in the room. And he sang songs very loudly. Though it’s very relaxing for him， it also make very noisy for neighbors. Maybe he should turn down the music. At noon， jack fed his pet cat henry. He is Jack’s favorite. Jack always play with him on the weekends. At night， he watched TV on the sofa. At the some time， he ate many delicious snacks. So he really had a great time.

At the of day， jack thought if I always have a relaxing Sunday like today. I will become the happiest boy all over the world.

I like to make friends, I can share my happiness and sorrow with friends. Friends are very important part of our lives, without them, I will be very lonely. I learn it when I was very small. It was Friday, I went to school to join the English contest, before I went into the classroom, I found I did not bring the admission card, I felt so worried, without admission card, I could not walk into the classroom. My friend Li looked at me and asked me what happened, I told him the truth, then he asked me to stay here and he rushed to our classroom. Ten minutes later, he came back with my admission card. I was so thankful, friends are very important.

我喜欢交朋友，我可以和朋友们分享我的喜怒和哀乐。朋友是我们生活中很重要的一部分，没有朋友，我会感到很孤单。我在很小的时候就学到了这点。那是星期五，我去学校参加了英语竞赛，在我走进教室之前，我发现我没有带准考证，我感到很担忧，没有准考证，我就不能走进教室。我的朋友李看着我，问我发生了什么事情，我告诉他事实，然后他叫我留在原地，他跑去了我们的教室。十分钟以后，他回来了，带着我的准考证。我很感激，朋友是很重要的。

[初中英语作文多交朋友

The Hope Project is a commonwealundertaking. It aims at helping the children who are out of school in the poorarea.

What this organization usually do is subsidize the children in the poorplace to go to school.

Hope Primary Schools are the result of it. I’m very movedfor the act of the Hope Project. With its help, more and more people in needcan go to school.

I hope the helping spirit will last forever, as it is the traditionalof China.

希望工程是一项公益事业。它旨在帮助那些在贫困地区的失学儿童。这个组织通常做的就是资助贫穷地方的儿童上学。希望小学就是它的杰作。对于希望工程的行为我非常的感动。有了它的帮助，越来越多的需要帮助的人可以去学校。我希望这种乐于助人的精神永存，因为它是中国的传统美德。

[初中英语作文：希望工程