It's particularly found in animals that hibernate - the ones that sleep during the winter.

这种现象冬眠动物身上尤其常见，冬眠动物是冬天只睡觉动物。

But researchers were proposing much more outlandish forms of hibernation well into the 19th century.

但研究者提出了更古怪冬眠形式一直到十九世纪。

Last year hibernating butterflies covered 35 percent more forest than the year before.

去年冬眠蝴蝶覆盖森林面积比前年增加了35%。

Do the bats' immune systems just take longer to boot up during hibernation?

蝙蝠免疫系统是不是冬眠期间需要更长启动时间？

Some hibernating mosquitoes turn out to have West Nile hibernating inside them.

一正冬眠蚊子内也有正冬眠西尼罗病毒。

Creatures hibernate to survive the cold weather and the absence of food.

动物冬眠抵御寒冷天气和食物匮乏。

A typical example of a hibernating creature is the bat.

动物冬眠典范就是蝙蝠。

Read the following article from a science magazine to see what hibernation is all about.

阅读以下选自科学杂志上文章，了解冬眠有关知识。

A mother grizzly emerges from her den after six months dozing underground.

灰熊妈妈正走出巢穴，长达6个月下冬眠结束了。

I was going underground to photograph dozens of them in their winter dens.

我要深入它冬眠洞穴里，里会有几十条西部菱斑响尾蛇。

A shower of Rain Water awakens hibernating creatures.

一阵“雨水”催动冬眠生物醒来。

He had campaigned for years to preserve the pine and fir forests where the butterflies hibernate.

多年来，他一直为保护松林和冷杉林而奔走，里是蝴蝶冬眠方。

Another hibernating creature is the bear.

熊是另一种冬眠动物。

Even animals in hibernation eat just enough to survive the coldness and scarcity of the winter.

即使是冬眠中动物也只吃足够食物来度过寒冷和稀缺冬天。

Did you know that Grizzlies like myself can gain up to four...Hundred pounds while preparing for hibernation?

你知道灰棕熊为冬眠做准备时候...可以长到四百磅重吗？

So a lot of the animals where hibernation was originally defined are some of the smaller mammals.

许多最初定义冬眠动物是一较小哺乳动物。

The frog, buried in the mud at the bottom of the pond, knew that spring was here.

池塘底泥土中冬眠青蛙，知道春天来了。

There, they were able to reach a state of hibernation that did not require them to eat.

里，它能够进入不需要进食冬眠状态。

In the Rockies, rising temperatures are shortening winter hibernation and stifling the growth of valuable food plants.

落基山脉升高气温缩短了冬眠时间，也阻碍了食料植物生长。

Bears that have hibernated throughout these peaks now all descend to the valleys, where spring comes earliest.

这片山峰之间冬眠灰熊现都下山了，里春天来得更早。