描写动物的英语作文10句(经典20篇)

If we dont take care of our lovely campus and make it hurt, we will suffer harm and harm our health.

Today, we need to protect the environment as our obligation to protect the environment with our actual actions. We should know how to protect the environment is to protect ourselves, we should not only use resources rationally, whenever they want to protect the environment, as a student, we should create more green campus. Starts from the minor matter, starts from now, starts from the care for the campus and protect the environment, picked up a piece of paper on the ground and save every drop of water, cherish every inch, walk more, dont cross the green, the grass. I believe that in the near future, our life will be another scene!

Students, we are the masters of the 21st century, the environmental awareness is not limited, we are looking at the campus. "Do not be good and not evil," for our common campus, let us act immediately.

Today is the happiest day in this holiday. Although I was very tired, I found myself in these busy day. I am afraid of taking a bus usually, the awful smell of the bus drive me mad ,make me feel carsick. But today I didnt feel carsick. I can defeat carsickness finally. At night I went out with an old friend who I ever liked him, but both of us were busy with the examination at the high school that we hadnt been together. I was so surprised that I received his calling. At first, I thought we would never meet after we graduated. Thank him gave me a happy day!

我们每个人都有自己喜欢的动物，那么，关于介绍动物的英语作文应该怎么写？今天小编为你整理了关于介绍动物的英语作文，希望对你有用。

The snake is a long and thin animal that lives in graor other dark places. A snake has no legs or feet, but it can move very fast on its stomach. Snakes usually have green, yellow or black skins, which make them difficult for their enemies to find them.Some kinds of snakes live in water. They can swim as freely as fish.

Snakes are cold-blooded animals. In winter they hibernatein holes which are narrow enough only to hold the snakes bodies. The snakes can sleep through a whole winter without eating and moving. They can not feel any pain. The hibernation period lasts about five months. When spring comes, the snakes come out and begin their normal life.

Snakes can take many things as food, such as mice, sparrows, frogs,birds eggs, pests and so on. People sometimes can see a snake eat a sparrow. First it moves close to the sparrow, then it puts out its tongue and brings the sparrow into its mouth and swallows it, which makes a lump in the snakes body. After some time the lump disappears.

As snakes are dreadful-looking, people are afraid of them. Many people drive them away whenever they see snakes. But in Chinese fairy tales, snakes are by no means bad. They seem to have human feelings. They can change into pretty girls. People like and respect them. The most well-known is the story about the White Snake and the Blue Snake.

In fact, snakes are not as dreadful as they look. They can help us to kill mice and pests. They can provide us with delicious meat. Their blood is a good drink. Poisonous snakes are especially useful. We can make valuable drugs with them.

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.

My favorite animals are swans.they are white.they can swim very well.I think they look like a beautiful girl in a white dress.they have a pair of wings and they can also fly well.I believe they are angles from the sky.they bring us love and make us happy.they are always friendly to us.We cant hurt them,because they are our friend.I love them!I like dogs,too.they are not beautiful,but they are the best friends.they keep the thieves away.Dogs have the best listening and eyes.they can hear in the nosiy,see in the dark.If we are in danger,they will help us at once.And they dont mind their lives.So,I love them.

Elephant is the largest animal on land today. It weights some ninety kilograms and is about one metre high when born. When it is 12 years old, it studs over three meters and does not grow any more. Elephant is usually grey in color, having a long trunk with large ivory tusks protruding from each side of its mouth. Usually moving in groups and caring for each other, Elephant is know to be a very and gentle creamre. For many years people have used the strength of these poweful animals to move trees and heavy logs. Elephant has been and is a vital tool for people to do many things that would normally be imposs-ible. Elephant is and will continue to be one of the greatest creatures man has ever come into contact with. Its size. beauty, and power willforever be useful to man.

[关于介绍动物的英语作文

星期天，奶奶从乡下到我家来，顺便给我带来了几个可爱的小生命——泥螺。

泥螺的外壳是淡黄色半透明的，我隐隐约约看见泥螺壳里有一些小灰点儿。我小心翼翼地把这些小生命安置在装着清水的玻璃瓶里。

放学后，我去看望它们。只见大部分泥螺静静地呆在玻璃瓶底，好像在睡觉。有一只泥螺用吸盘紧紧地吸住玻璃瓶的边沿，好像怕有人来把它抓走似的。不一会儿，它悄悄地把肉质的小脑袋从壳中伸出来，只见脑袋上长着两根细小的触须，这大概是用来分辨方向 的吧。触须下长着一双透明的像小米粒大的眼睛，真有趣。只见它的小脑袋慢慢地左右转动，好像在窥视有没有敌人来伤害 自己 。过了一会儿，它没发现什么危险，便放心地从透明的外壳中抽出了土黄色肉质的小身躯，缓慢地左右扭动，好像是“迪斯科”的慢动作 。这个小生命生活得多么悠闲 啊！

好几天了，我一直没给泥螺喂吃的，没想到它们竟活得好好的。我问爸爸：“泥螺吃什么呀？”爸爸说：“它吃水中的微生物，能使水变清洁，你可不能小看它啊！”我恍然大悟，怪不得有人叫它清水泥螺，原来它还是令人尊敬的“水中清洁工”啊！

我先给大家说说它们的来历吧!前几天我嚷嚷着让爸爸给我买鱼，他答应了。我们来到一个叫“海洋一族”的水族馆。

哇!好漂亮呀!我惊呆了，这里的鱼各式各样，有：热带鱼、野鱼苗……爸爸给我捞了七条鱼。有两条红色，两条黑的，三条花花的。我高兴地把它们带回了家。一到家，我就迫不及待地把它们放进鱼缸，并给它们喂了鱼食。

就在第二天早上，鱼竟然死了三条，我十分伤心，爸爸安慰我，“没关系，别伤心。”听了爸爸的话，我的心情渐渐平静了下来。

过了几天，剩下的四条鱼还活着，它们保持着旺盛的精力，游戏时它们摇头摆尾，舞动着鱼鳍。在水里欢快的游着。我给它们喂食的时候，它们总是争先恐后的抢食物，你追我赶。尤其是那条大金鱼，它非常霸道，另外三条小金鱼见了它，有些畏惧，总是小心的去吃食。

我很喜欢这几条小金鱼，我会好好爱护它们，并把它们喂养的更加健康，直到它们慢慢长大。

Monarch butterfly is a beautiful insect.

Monarch butterfly is insect, it is beautiful, every year , Milli0ns of Monarch butterflies fly from Canada to Mexico ,the way is about 4000 km. they fly 45km every day .Why do they go to Mexico? Because , Canada is too cold ,they are live in Mexico six months ,from April to October . And then, new Monarch butterflies are fly from Mexico to Canada, they are not “old” Monarch butterflies, because Monarch butterflies lay their eggs and the they die.

In the Canada, new Monarch butterflies lay eggs ,and then die, the egg change to the Monarch butterfly caterpillar, the Monarch butterfly caterpillar change to the Monarch butterfly chrysalis , the Monarch butterfly chrysalis grow to the adult Monarch butterfly, the adult Monarch butterfly lay egg and then die ……

I have a question : How do the Monarch butterfly know the way? Maybe only Monarch butterflies can answer this questions.

Winter morning is sometimes good, sometimes bad, really make people wonder.

It makes me know what the cold and windy, let me know the taste of the knife, but it is sometimes good.

Open the window in the morning and found the earth covered with a thick layer of white cotton blanket, bare tree also put on a white clothes, from afar, beautiful ah! Ran out, playing in the snow two roll, Kick a few feet, race a few times to run, catch a few times to hide, playing a few snow battle, heap a few snowman. Ah, really happy!

Into the foot of the forest, the forest is not a spring of vitality, but I believe that the spring will come. Climbed to the mountainside, has been about to see the end of the town. At this time, the town has been a pair of white hands to protect. Climbed to the top of the hill, the sun has been from the horizon, struggling out. At this time, found the town is so cute, surrounded by several hills to help the town against the cold wind.

My favorite winter snow. Snow is the beauty of beauty: powder makeup jade puzzle, snow vast. In the morning, open the doors and windows: a tree tree with a long blossoming pear. This reminds me of the "Suddenly the night of the spring, thousands of trees million pear tree open."

In this morning full of infinite dreams, I understand that people simply so easy. Winter morning beauty, with us to enjoy. Winter in the context of nature, enjoy blooming with their own grace, for our lives add infinite vitality and vitality.

The autumn girl walked around and painted a pair of beautiful paintings.

Field, rice rice seems to be a white, wrapped in leather, as if the mother, tightly holding the child. We see the cotton, a round of cotton, colorful, some are red, some are white, there is a blue ... ... also saw a few strings of sorghum, they hold the torch, seems to say: "fall to the farmer uncle Come pick me! "

Orchard, apple tree like a soldier, standing on the grass. Pear tree carrying a "little lantern", lit white light, really nice ah!

Garden, morning glory blowing small speaker "toot, beep!" Really nice. We are looking forward to a flash in the pan, the night to the epiphyllum open, we exclaimed: "Epiphyllum is really nice!" I saw, really deserved reputation. Epiphyllum seems to be a beautiful angel, wearing a white dress.

In the fall, how can we not take a kite?

We go to the kite, a person holding the kite by hand, another person in the distance, say "let go", kite flew up immediately, jumping in the clouds dance. White clouds drifted, sprinkle a burst of warm exhort: "kite, I hope you can fly to the vast boundless universe." We see the kite flying in the air, very happy!

Fall, I want to praise you, you give us a beautiful harvest season for mankind!

放寒假了，我回老家的时候发现我家有两只小羊羔，它们非常可爱，招人喜欢。一只小羊毛微卷，尤其喜欢用鼻子到处闻人身上的味道，有时候够不着，就跳起来用前脚搭在人身上闻。另外一只小羊好斗，喜欢用角撞人的小腿，每次我先用腿碰它的头逗它，它回立刻反击，有时候甚至先后退几步再冲向我的小腿，喉咙里还发出”咩”的声音。

记得有一次我姑姑到我们家的时候，我们和好斗的小羊玩，姑姑坐在椅子上，好斗的小羊从侧面跳到姑姑是身上，连续了两次，小羊可能挺兴奋的竟从正面跳上姑姑的身上，小羊角撞到姑姑的眼镜，顿时见姑姑跳起来把小羊吓跑了。姑姑捂着鼻子眼睛水汪汪的，原来眼睛的镜托把姑姑的鼻子撞的流血了

It is cold and dry outside.The wind often blows strongly.The days are shorter and the nights are longer.Many animals go to sleep.They will sleep for a long time till the spring comes.People don’t like to go outside.They have to wear heavy coats,scarves and gloves.But children like to be outside.Because it often snows.There is snow around.There is ice on the ground.Children can throw snowballs,make the snowmen.Oh,look.What a surprise!Do you see?The river is frozen!Here come the boys,there come the girls,they are skating in the river happily.

Oh!Winter comes.It is really an interesting season.It has so much fun!

[描写冬天的作文英语

Stationery, we are very familiar with, some people like bags, some people like pencil cases, some people like pencils, and some people like rubber, but I like my "pet" - small rabbit.

It was that time I went to my mother unit, my mother gave me, so far, it is intact. Its color is red, far from a look, like wearing a red coat, sort of a small. It looks very gentle, lying on the ground like a red blanket. Its head with a pair of big ears, a pair of bright eyes below the red nose, there are long beard, limbs are golden, chest still holding a golden ingot, which says a " Blessing "word.

It is not only peculiar shape, or my little partner in my life. Whenever I am sad, it seems to be comforting, "Do not be sad, every day to be happy, okay?" Whenever this time I will be very happy. Remember that once, I test the test of 100 points, after returning home, I am happy to the rabbit said: "I test 100 points", as if the little rabbit and said to me: "I am happy for you, but not proud ah! "Look at the little rabbit and lovely and calm expression, I suddenly converged my excitement, I thought Bunny said, if I am proud, then I next test bad, I am very grateful to the rabbit can be timely remind me!

This is my little rabbit, do you like it?

My day is busy.In the morning,I get up at six.I brush my teeth and put on my clothes.Then I eat breakfast at half past six.At six fifteen I go to shool.I get to school at around seven oclock.Classes begin at half past seven.After have two classes,I do sports at nine.And then I play game with my friend.In the afternoon,I eat lunch at twelve oclock.I go shopping in the shop with my sister.School over at ten past four.I go home and get home at around five oclock.At six oclock,I eat dinner.Then I take a shower and do my homework.At nine,I watch TV.I go to bed at around ten oclock.

There used to be many kinds of birds which are pests for protected crops. They are good friends at present.But the number of the birds has been greatly reduced because too much poison is used. As the result, the numberof the pests has increased.The peasants spent a lot of money and time in killing them every year.But it is still hard to eliminate them.Now you can see how poor it is for us to protect wild animals and to keep the balance of nature.Only that everyone know these can we live on a beautiful lives.

曾经有许多鸟类都能够保护庄家，以防害虫的侵害。他们是农民的好朋友。但是鸟类的数量正在急剧减少，这是因为人们大量使用农药造成的。所以，害虫的数量增加了。每年，农民都会花费大量经费，以及时间来消除害虫。但是，人们还是很难将它们清除。如今，我们无法保护野生动物，并无法保持生态平衡。只有我们所有人提高意识我们才能过上幸福的生活。

Today, as our economy develops fast, people live a much better life than

before, they start to pay attention the chase fun. When people have holiday,

they will choose to travel, most people will give money to the organization,

while some people choose to self-helptraveling. Self-help traveling can save a

lot of money, people can save the money which is given to the tour guide. What’s

more, self-help traveling can bring people a lot of fun. People can visit the

site as long as they want, sometimes they can find the interesting things in the

small place. While the tour guide will always take people to the commercial

place. Self-help traveling is becoming more and more popular now.

In life, there are many people who are contributing to society. An angel who works like a policeman and works for the flower of life. But the person I most want to praise is a cleaner.

Every morning, when I had just had breakfast, I heard a "whizz" sound on the road behind the wall. The voices were unfurled by the dustmen of the dustmen. The dustmen sweep the dirt on the road to clean up the waste water and ensure the cleanliness of the roads. They are not afraid of hardship, not afraid of fatigue, just to make the vehicles safe passage.

When I was out of school in the afternoon, the cleaners were shuttling back and forth between asphalt and asphalt, collecting the rubbish left by the passengers. Then pour buckets of water on the road, and then sweep the dirt and waste together with dirty water.

Many cleaners start early, early and late, do the same work every day, and cause back pain. The eyes had been spent, but they had no complaints. I really want to praise them. They are the best. Work silently, like the poem of the poet in the southern song dynasty, "make a hundred flowers to make a secret, for who will be the best for the sweet." Its the bees that make the honey, and the cleaners are the bees that work silently.

Everyone knows animals are our friends.So we should be friendly to them.But some people kill the rare animals,such as pandas,golden monkeys and so on in order to get money.It will cause these animals to disappear soon.I think our government should punish those people severely who kill the rare animals.It is our duty to protect the endangered animals.

动物也是我们这个世界里的一份子，跟我们意义，生活在同一片蓝天之下， 呼吸一样的空气。下面是小编整理收集的描写动物的四字词语，欢迎阅读！

狗头鼠脑

[gǒu tóu shǔ nǎo]

比喻奴才相。

羊毛出在羊身上

[yáng máo chū zài yáng shēn shang]

比喻表面上给了人家好处，但实际上这好处已附加在人家付出的代价里。

闻鸡起舞

[wén jī qǐ wǔ]

听到鸡叫就起来舞剑。后比喻有志报国的人及时奋起。

莺歌燕舞

[yīng gē yàn wǔ]

黄莺在歌唱，小燕子在飞舞。形容春天鸟儿喧闹活跃的景象。现常比喻革命和建设蓬勃兴旺的景象。

千军万马

[qiān jūn wàn mǎ]

形容雄壮的队伍或浩大的声势。

车水马龙

[chē shuǐ mǎ lóng]

车像流水，马像游龙。形容来往车马很多，连续不断的热闹情景。

望子成龙

[wàng zǐ chéng lóng]

希望自己的子女能在学业和事业上有成就。

打草惊蛇

[dǎ cǎo jīng shé]

打草惊了草里的蛇。 原比喻惩罚了甲而使乙有所警觉。后多比喻做法不谨慎，反使对方有所戒备。

鸡零狗碎

[jī líng gǒu suì]

形容事物零碎细小，不成系统。

调虎离山

[diào hǔ lí shān]

比喻为了便于乘机行事，想法子引诱有关的人离开原来的地方

狗逮老鼠

[gǒu dǎi lǎo shǔ]

比喻做外行事或多管闲事。同“狗拿耗子”。

狗续金貂

[gǒu xù jīn diāo]

比喻滥封的官吏。

猪突豨勇

[zhū tū xī yǒng]

豨：野猪。指拼命向前冲，不怕死的人（含贬义）。

狗续侯冠

[gǒu xù hòu guàn]

犹狗续金貂。 比喻滥封的官吏。

鸡鸣狗盗

[jī míng gǒu dào]

鸣：叫；盗：偷东西。 指微不足道的本领。也指偷偷摸摸的行为。

对牛弹琴

[duì niú tán qín]

讥笑听话的人不懂对方说得是什么。用以讥笑说话的人不看对象。

肉袒牵羊

[ròu tǎn qiān yáng]

牵羊：牵着羊，表示犒劳军人。古代战败投降的仪式。

牵羊担酒

[qiān yáng dān jiǔ]

牵着羊，挑着酒。表示向人慰劳或庆贺。

惊猿脱兔

[jīng yuán tuō tù]

如受惊的猿猴、脱逃的兔子。形容迅速奔逃。

鸡飞蛋打

[jī fēi dàn dǎ]

鸡飞走了，蛋打破了。比喻两头落空，一无所得。

狗吠之惊

[gǒu fèi zhī jīng]

吠：狗叫；惊：惊吓。 比喻小的惊吓。

猴年马月

[hóu nián mǎ yuè]

猴、马：十二生肖之一。 泛指未来的岁月。

狗吠非主

[gǒu fèi fēi zhǔ]

比喻臣子各忠于自己的君主。

心猿意马

[xīn yuán yì mǎ]

心意好像猴子跳、马奔跑一样控制不住。 形容心里东想西想，安静不下来。

人怕出名猪怕壮

[rén pà chū míng zhū pà zhuàng]

人怕出了名招致麻烦，就象猪长肥了就要被宰杀一样。

鸡犬升天

[jī quǎn shēng tiān]

传说汉朝淮南王刘安修炼成仙后，把剩下的药撒在院子里，鸡和狗吃了，也都升天了。 后比喻一个人做了官，和他有关的人也跟着得势。

虎口拔牙

[hǔ kǒu bá yá]

从老虎嘴里拔牙。比喻做十分危险的事情。

动如脱兔

[dòng rú tuō tù]

比喻行动敏捷。

惊弓之鸟

[jīng gōng zhī niǎo]

被弓箭吓怕了的鸟不容易安定。比喻经过惊吓的人碰到一点动静就非常害怕。

猪卑狗险

[zhū bēi gǒu xiǎn]

比喻卑鄙阴险的人。

使羊将狼

[shǐ yáng jiàng láng]

将：统率，指挥。派羊去指挥狼。比喻不足以统率指挥。也比喻使仁厚的人去驾驭强横而有野心的人，这要坏事。

犬兔俱毙

[quǎn tù jù bì]

比喻双方同归于尽。

多歧亡羊

[duō qí wáng yáng]

因岔路太多无法追寻而丢失了羊。 比喻事物复杂多变，没有正确的方向就会误入歧途。也比喻学习的方面多了就不容易精深。

问羊知马

[wèn yáng zhī mǎ]

比喻从旁推究，弄清楚事情真相。

十羊九牧

[shí yáng jiǔ mù]

十头羊倒用九个人放牧。比喻官多民少，赋税剥削很重。也比喻使令不一，无所适从。

以羊易牛

[yǐ yáng yì niú]

易：更换。 用羊来替换牛。比喻用这个代替另一个。

狐死兔泣

[hú sǐ tù qì]

比喻因同类的死亡而感到悲伤。

羊入虎群

[yáng rù hǔ qún]

比喻好人落入坏人的手中，处境极端危险。

屠所牛羊

[tú suǒ niú yáng]

比喻临近死亡的人。

我非常喜欢小狗，因为狗对人是忠诚的，所以就要求外婆给我买一只。小狗终于买回来了，母的，它的品种是吉娃娃，我们给它起名叫妞妞.

妞妞的性格很内向，刚来外婆家的时候什么也不敢吃。后来，慢慢的，妞妞知道外婆是他的新主人了，就成天像猪一样，一天差不多能吃两个馒头。我和外婆都说：“咱家养了一只“猪”！”

不过妞妞也有不听话的时候，只要他不听话，外婆就会说：“棍儿哩？棍儿哩？”这时，妞妞就躲在窝里或沙发底下不敢出来了。它还有一种方法，例如：我准备上学呢，妞妞也非要去，我一吵它，它就躺在地上让我给它抓痒，你说好笑不好笑？

妞妞很胆小，看见一只小蟋蟀就不敢走了，不过有时候他也很厉害，就是遇上比自己大的狗也敢斗一斗。

有一次，我带妞妞去帝豪广场玩，我和妞妞走着走着，遇见一只比妞妞大得多的萨姆一，我叫它躲开，可他还不听劝，往后面退几步，好像正在戴拳击。然后大摇大摆的冲向前去，准备跑过去跟大狗作战呢！

我喜欢小狗，妞妞给我的生活带来了很多乐趣！

这一周的观察日记是，记录自己喜欢的一种小动物。星期一看到老师发的短信，我就犯愁，从哪儿弄个动物呢？先不要说喜欢不喜欢这个动物，光说弄个活物养家里似乎就不是件容易的事。不由的感叹生活在城市的孩子好可怜啊，想当年我们成长在农村，小狗啊、小猫啊、小鸡啊、小兔啊……什么时候身边缺少过动物？

弄个什么动物养家里即安全又好养呢？西瓜虫？太恶心了！蚂蚁？好像提前过冬去了。蜗牛？不知道好不好找。放了学，天快黑才到家，我和远儿打了手电筒决定到楼后的草丛里找些蜗牛。

地面上的蜗牛看起来很多，但我严重怀疑它们是否是活的，随便捡了几个，又在墙上找了3个，最后又在家里窗户上找了一个很小的。弄了些土倒在花盆里，把土和花盆喷湿，这样蜗牛的家就算建好了。远儿把刚捡回来的蜗牛对着灯光仔细甑别了一番，只留了4只，其它的都扔了出去。我想那4只一定是墙上和窗户上的蜗牛。

把蜗牛放进温暖、潮湿、舒适的家里，我就去做饭了。远儿一边拿了喷壶继续喷水，一边嘴里嘟嘟囔囔的说：“蜗牛什么时候出来啊？”“怎么还不出来呢？”，等的不耐烦就去写作业。

我们吃过饭，检查完作业，再看蜗牛，奇迹在我意想不到的时候出现了，蜗牛出来了！在潮湿的土里慢慢的爬着。呵呵，太惊喜了！我和远儿相互拥抱以示庆贺。远儿很后悔日记写的早了，要不可以把这一奇迹写进去的，我劝他说没关系，可以写到明天的日记里。

小小的蜗牛给我们带来这么多的乐趣，蜗牛还有哪些神奇的表现呢？期待中！

I was only nine years old when I learnt how to use a computer. My mother is  my first teacher. I know how to type, how to copy a file, and how to visit a web  site on the internet. One day, mom was not at home.

I turned on the computer and began to learn how to chat on net. The first  one I met there was a boy called tom. He greeted me politely. When he knew that  I was only a 9-year-old girl, and almost knew nothing about chatting on net, he  started showing me how to use the chatting tools, how to download, and how to  send e-mails. I learnt a lot from him.

[描写我的网友英语作文

A triple bacon cheeseburger seems like a heart attack on a plate.

三层奶酪咸肉汉堡感觉吃完很容易让人突发心脏病。

So how can polar bears thrive on their version, seal blubber?

那么,北极熊是如何处理这些高热量食物的呢?

Turns out theyve stocked up on genes that let them clear fats from their blood.

结果显示它们储存在遗传基因里的信息使得它们能够清除血脂。

Thats according to a study in the journal Cell.

这是根据《细胞》杂志上的一篇研究得出的结论。

Polar bears are well adapted to life on the sea ice.

北极熊非常适应在浮冰上的生活。

Up to half their body weights fat, which gives them extra insulation and buoyancy, and provides them with a ready source of energy.

几乎占它们身重一半的脂肪足以使它们保暖并且维持体力，提供给它们一种易转化的能量。

But how can an animal so fat also be so fit?

但一种动物怎么能又胖又健康?

Researchers compared the genomes of polar bears with those of brown bears, and found that polar bears have accumulated genetic changes that boost their heart health and fat metabolism.

研究人员们通过比较北极熊和棕熊的基因，发现北极熊的基因组中积累了不少有利于心脏健康和脂肪代谢的遗传突变。

One gene in particular, called ApoB, helps move cholesterol out of the blood—where it causes problems in humans—and into cells.

特别是编码为载脂蛋白B的基因有助于清除血液中对人类有害的胆固醇转变成细胞代谢。

These genomic changes happened quickly, evolutionarily speaking.

这些遗传变化从进化的角度来讲发生的十分快。

Polar bears and brown bears diverged from a common ancestor less than half a million years ago.

北极熊和棕熊都来自于同一个祖先，它们是在大约50万年前左右开始向不同分支进化。

But if that seems super speedy, the ability to digest lactose didnt spread through human populations until we domesticated cows, just 10,000 years ago.

但是如果这种变化看上去十分快速的话，消化乳糖的酶逐渐进化到人类各个种群中也还是发生在大概1万年前我们可以驯化乳牛之后。

A moooving testament to the power of natural selection.

这是自然选择力量的证明。