保护北极熊英语标语精选50条

描写濒临危机动物的英语作文北极熊

　　北极熊，是世界上最大的陆地食肉动物，又名白熊。下面是小编分享的描写濒临危机动物的英语作文北极熊，欢迎大家阅读！

　　写濒临危机动物的英语作文北极熊篇一：

　　When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bears spend the summer fasting. At least, that's what's supposed to happen. As the planet warms, the warmer ice-free season is getting longer and longer. So what's a hungry bear to do?

　　Scientists once thought that polar bears might survive by supplementing their pinniped diet by turning to terrestrial foods like snow geese, their eggs and caribou.

　　"We've had this debate in the literature about whether terrestrial foods are nutritionally relevant to polar bears during the on-land season when the ice has melted."

　　University of Alberta biologist Nick Pilfold.

　　"And we've known for a long time, going back to research in the early 70s, even going to back to early explorer logs, that polar bears will consume terrestrial based foods. But the debate was always whether those foods actually add up, energetically." In other words, do these substitutes provide enough nutrition to make up for the lost seals?

　　To find out, Pilfold and his colleagues estimated the weight lost each day by polar bears in the wilds of western Hudson Bay during the ice-free season, when they could ostensibly be chowing down on terrestrial foods. Then they compared that to the weight lost by bears that are temporarily held in Manitoba's Polar Bear Alert Program.

　　While captive, the bears do not eat. They drop about one kilogram each day. But the wild bears, who had access to the Arctic snack bar, lost the same amount of weight each day. The results are in the journal Physiological and Biochemical Zoology.

　　"Which is really saying that the terrestrial foods do not have dense enough energy to offset the mass loss. So this idea that bears can just switch from eating sea ice–based food to land food and that's going to help supplement against longer ice-free seasons, that really doesn't show up in the data."

　　The problem is that polar bears evolved to rely on the marine diet.

　　"The food on land is protein and carbohydrate based, and the food the polar bears really focus on is fat. Fat is the name of the game for these bears; they're highly adapted to absorbing that fat into their system and putting it onto their body as body mass, so they can fast on it later on. And the only thing that's going to provide them with that type of fat are marine mammals. And they can only access those marine mammals when there's sea ice."

　　Adult males can go eight months without food. But younger, sub-adult bears, which are no longer nursing and must hunt, can't last as long without sea ice. So as the Arctic warms, younger polar bears will disproportionately die out. Leaving the species' survival in doubt.

　　北冰洋在秋季结冰以后，北极熊就会出发去寻求它们最喜欢的食物：富含脂肪的海豹和胡子海豹。海冰在夏季开始融化断裂。这使北极熊在夏季无法吃到美味的海豹，所以它们进入禁食期。至少，情况应该是这样。但是由于地球变暖，温暖的无冰季节越来越长。那饥饿的北极熊要怎么办?

　　科学家曾经认为，北极熊可能会转向陆地上的食物来补充它们对鳍足类动物饮食的需求，进而生存下去，这些陆地食物包括雪雁、雪雁蛋和北美驯鹿。

　　“文献中有过这类辩论，即在寒冷融化时陆地食物是否能满足北极熊的营养需求。”

　　尼克·皮尔福德是加拿大阿尔伯塔大学的生物学家。

　　“通过上世纪70年代初的研究，还有早期的探险者日志，我们很早以前就知道，北极熊会以陆地食物为食。但是辩论的焦点在于，这些食物是否能增加北极熊的能量。”换句话说，这些替代食物能否为北极熊提供足够的营养，弥补不能进食海豹带来的损失?

　　为了解开这个疑惑，皮尔福德及同事对西哈德逊湾荒野地区的北极熊在无冰季期间每天失掉的体重进行了估算，从表面上看，北极熊在这段时间食用了陆地食物。随后，他们将这一数据与通过马尼托巴北极熊预警计划暂时捕得的北极熊所失掉的体重进行了对比。

　　在被关期间，北极熊不吃东西。它们的体重每天大约下降1公斤。虽然野生北极熊能享用北极“小吃”，但是它们的体重每天也同样会下降1公斤。这一研究结果发表在《生理学和生化动物学》期刊上。

　　“显然结果表明，陆地食物不能为北极熊提供足以抵消大量损失的能量。所以，北极熊可以从食用海冰下面的食物转向食用陆地食物，并帮助它们对抗日益延长的无冰季这个观点，并没有在这项数据中得到证明。”

　　问题是，北极熊进化成了依靠海洋食物的动物。

　　“陆地食物以蛋白质和碳水化合物为基础，而北极熊需要的食物以脂肪为主。脂肪是这些熊真正需要的东西;它们高度适应的情况是，将脂肪吸收进它们的系统中，然后把这些脂肪放在身上以增加体重，这样它们之后就可以依靠这些脂肪来度过禁食期。唯一能提供给北极熊这种脂肪的就是海洋哺乳动物。但是它们只能在有海冰时食用到这些海洋哺乳动物。”

　　成年北极熊可以8个月不进食。但是小一些的未成年北极熊已经不再被哺育，它们必须要去猎食，可是它们不能在漫长的.无冰季期间一直不进食。所以，随着北极地区变暖，较小的北极熊将会大批死亡。这使这些物种的生存成为问题。

　　写濒临危机动物的英语作文北极熊篇二：

　　Russian Scientists Surrounded by Polar Bears

　　俄罗斯科学家被北极熊包围

　　Relief supplies finally arrived on a remote Arctic island where a group of scientists had been trapped in a weather station. Up to a dozen polar bears had surrounded the station on the island of Troynoy and set up camp approximately two weeks ago. The bears were becoming more aggressive over time, killing one of the station's dogs and breaking a window. On Wednesday, a helicopter that picked up supplies from a nearby vessel arrived with dogs and flares and was able to scare away the bears and allow the researchers to get back to work.

　　救灾物资终于抵达了偏远的北极岛屿，有一批科学家被困在那里的气象站中。大约两周以前，十几只北极熊将特洛伊诺伊岛(Troynoy Island)上的一个气象站团团包围，并在那里安营扎寨。随着时间的流逝，北极熊变得越来越有攻击性，咬死了气象站的狗，还打破了窗户。周三，一架从附近船只上携带犬和照明弹物资的直升机到达岛屿，能够将北极熊吓走，让科学家正常工作。

　　写濒临危机动物的英语作文北极熊篇三：

　　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 they've 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。

　　That's 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 weight's 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 didn't 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。

　　写濒临危机动物的英语作文北极熊篇四：

　　The global polar bear population could decline by more than 30 percent in as little as 35 years. That's according to a new study in The Royal Society's Biology Letters.

　　全球北极熊数量在35年内可能下降超过百分之30。这是根据英国皇家学会生物学快报的一项新研究。

　　Researchers looked at climate change effect on the Arctic Sea and calculated the likelihood of this projected population drop is 71 percent.

　　研究人员观察气候变化对北极海的影响，并计算出预计种群下降的可能性为百分之71。

　　That's because polar bears stand on Arctic Sea ice when hunting for seals. According to NASA, even the thickest ice in the Arctic Ocean has "either thinned or melted away."

　　这是因为北极熊捕猎海豹时站在北极海的冰上。美国国家航空航天局表示，甚至北冰洋最厚的冰要么变薄或要么融化了。

　　And just this week, scientists reported sea ice levels in the area were at a record low for this time of year.

　　就在本周科学家报告称，该地区的海冰水平创下一年中这个时候的历史新低。

　　This all adds up to not great news for polar bears. With an estimated population of 26,000, the bears are already listed as a vulnerable species by the International Union for the Conservation of Nature.

　　这对北极熊不是什么好的消息。现估计有26,000头北极熊，已被国际自然保护联合会列为易危物种。

描写动物的英语作文

　　下面是语文迷为大家整理的描写动物的中考英语作文，欢迎阅读参考。

　　描写动物的英语作文篇一

　　I have a dog, it is lovely, it is called Mimi. Every time I go home from school, Mimi always cruising around me, I will go to the kitchen to get a piece of meat to it, it lay on the floor to eat. My legs and then jump to bark "Wang "called, so I picked up Mimi, it is the opportunity to lick my hand, making me laugh.

　　I like Mimi, like puppies.

　　我有一条小狗，它很可爱，它叫咪咪。每当我放学回家时，咪咪总是围着我绕圈，我便去厨房拿一片肉给它，它就趴在地板上吃。然后跳到我腿上汪汪汪地叫，于是我抱起咪咪，它就乘机舔我的.手，逗得我哈哈大笑。

　　我喜欢咪咪，喜欢小狗。

　　描写动物的英语作文篇二

　　Dolphin is my favourite animal.

　　It is one of the most precious animals. Their bodies are very long, about one zhang(丈). Dolphins live in the sea. They live on fish, shrimps and so on.

　　Dolphins are very friendly and peaceful. They never attack people. Instead, they have saved many people in danger in the past years. How helpful the dolphins are!

　　Dolphins are very clever. People often train them so that they can give a dolphin show which brings people a lot of happiness and joy.

　　Unluckily, the number of dolphins is getting smaller and smaller. Because of water pollution, there is less and less space for dolphins. Many people make money by hunting dolphins. If we don’t protect them, maybe we’ll lose our good friends one day. As a student, I hope more and more people should take actions to protect dolphins.

　　描写动物的英语作文篇三

　　My favourite animal is tortoise. Tortoise walk not fast. But I like the tortoise. Why? Because, tortoise is a cute animal. It have a short tail and a four short foot. It have a little head and a hard shell. They are forty-five little and cute tortoise in My home. They like to play in the water. When they afraid some thing. They wall run fast. They like to eat the fish. I often buy some small fish to them to eat. They can catch the fish fast. First, they fake(假) sleep. When the fish swim near they mouth. They catch the fish fast and bit the fish head. So, the fish die. They can eat the fish. In winter. They like to sleep in the sand. When they sleep, they don’t eat any food.Because they wall hibernation. But, when they are thirsty. They come out of the sand. So, we must give water to them to drink.

　　I love the tortoise. I hate the eagle. Because, the eagle often eat the tortoise with it sharp mouth.My favourite animal is tortoise.

描写动物的小升初英语作文

　　动物不仅是人类的好朋友,而且是人类的好帮手，下面为大家分享几篇描写动物的小升初英语作文，供大家参考学习

　　描写动物的小升初英语作文

　　.I like animals very much. I have a dog, It’s my favourite animal. It’s white, It looks like a snow ball. It has two big eyes and ears. But its nose and mouth are very small. It’s very naughty.

　　It often stares at my food when I have a meal. When I’m home it follows me all the time.

　　When I do my homework, it often sits beside quietly, but sometimes runs around me and shouts: wom wom.

　　I like my dog very much.

　　我非常喜欢动物。我有一只狗，这是我最喜欢的动物。它是白色的.，看起来像一个雪球，有两个大眼睛和耳朵。但它的鼻子和嘴是非常小的。它非常的调皮。

　　当我吃饭时，它常常盯着我的菜。当我回家时，它就一直跟着我。

　　当我做我的功课时，它常常坐在旁边静静的，但有时也会跑到我身边，并大叫：汪汪 汪汪。

　　我非常喜欢我的狗。

　　.Here is a small zoo. I like the tiger，although they are very ugly，but very imposing. Also has the national treasure panda，they are a little shy，does not dare to look at us. Who are those? they are elephants，you look at they to be huge，also has a point to be interesting. I do not like the lion，they compare the tiger clown，is also unimposing.

　　This is the small zoo.

　　这是一个小动物园。我喜欢老虎,虽然他们很丑陋,但很壮观的。也有国宝熊猫,他们都有点害羞,不敢看我们。这些是谁?他们是大象,你看他们是巨大的,也很有趣。我不喜欢狮子,他们比较老虎小丑,也没有威信的。

　　这是小动物园。

　　My grandparents have a dog, they have raised him for two years. It has yellow fur, so I call him little Yellow. Little Yellow recognizes me, because when I come to visit my grandparents, he won’t shout at me, he will lie down and swing his tail, letting me to touch him. I like him so much, I will give him a lot of bones to eat.

　　我的祖父母有一个小狗，他们已经养了两年了。小狗有黄色的毛，因此我叫他小黄。小黄认得我，因为在我看望祖父母的时候，他不会朝着我叫，他会躺下来，摇着尾巴，让我去抚摸他。我很喜欢他，我会给很多骨头他吃

描写动物的英语作文及翻译

　　篇一：

　　Do you know what kind of animal I like most? It’s monkey. Monkey is a kind of lovely animal. Many people like monkeys very much. Generally, monkey has small body covered with fur. Some kinds of monkeys have two big eyes and ears and a long tail. I can see them on TV or the zoo. Every time I go to the zoo, I will go to see them. Monkeys often stay in trees and jump between them. They are so lively and favorable. When they are happy, they will act for visitors. It’s very funny.

　　你知道我最喜欢的'动物是什么吗?是猴子。这是一种非常可爱的动物，很多人都非常喜欢它们。一般来说，童子的身子比较小，身上长满了毛。其中的一些种类有两只大眼睛、大耳朵和一条长尾巴。我可以在电视上或动物园里看见它们。每次我去动物园，我都会去看猴子。它们常常待在树上，在树木之间跳来跳去，非常活泼，讨人喜欢。它们高兴的时候，还会特别表演给游客看，非常好玩。

　　篇二：

　　I love dogs,dogs are the cutest animal ever on earth.From small and cute ones to big and fierce ones.I love all kind of them.They say dogs are man's best friends.I agree with that because dogs are royal,friendly and fun to play with.Some of them are extremely cuddly and soft to hold and hug.While some of them are extremely royal and helps us guard all our properties.