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动物英语作文 篇1
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。
动物英语作文 篇2
Earth's biological diversity is being fast decline of many species facing extinction. Threat to the survival of wild animals and plants is a major factor in habitat loss, business development, and wild animals and plants and their products in international trade.
Resources are limited, it is necessary for the endangered species, to propose specific measures of protection level.
We can formulate the corresponding endangered species laws, application to establish nature reserves, endangered species breeding centers, means of conservation biology, endangered species, the implementation of in situ conservation and ex situ conservation.
At the same time, we must restrict international trade in Endangered Species of Wild Fauna and Flora, to make laws to protect endangered species.
动物英语作文 篇3
There are more and more endangered animals at present，so how to protect them has been our task of top priority .It's wrong for people to hunt animals for their meat and feather，for they are our good friends。We should protect them instead of killing them。Giant pandas，which are one of the endangered animals，live in the forests and live on bamboo lealves。They can just live safely in the natural protection zones。We should stop killing animal and protect them。
动物英语作文 篇4
Human rights are important privilleges. Many reasons support this. One of the reasons is two heads are better that one, it is more accurate. If the leader don't know what to do, he or she could just simply raise a vote and let the other citizens help him/her out. The second reason is individuality. Individuality is an important issue, without it, the world would be just a big glob of, well, people. The third reason is to follow the trend. What that meant is to follow what others think of, mainly what the major idea of people has is right. Due to those reasons, I strongly believe that human rights are important.
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