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Winter in many places is very cold.
很多地方的冬天都很寒冷。
There is lots of snow around, and the ground freezes, which can make life difficult for animals.
到处都是积雪，大地被冰封，这让动物们的生活变得艰难。
People in cold places live in warm houses and have learned to adapt. What do animals do?
生活在寒冷地区的人类，居住在温暖的房屋里，并且已经学着习惯了。那动物们怎么办呢？
There are three main ways that animals survive the cold in winter: sleep, adapt or migrate.
动物们挺过冬天严寒的方法主要有三种：睡觉、适应或迁徙。
Some animals, such as bears, frogs and snakes, sleep all winter.
某些动物，例如熊、青蛙还有蛇，会睡一整个冬天。
They sleep very deeply and need little or no food.
它们睡得非常熟，并且几乎不需要或着完全不需要食物。
While sleeping, their body temperature drops, and their heart beat slows down.
在睡觉的时候，它们的体温降低，心跳减速。
To prepare for this before winter, these animals eat extra food to become fat, which gives them the energy they need while they sleep.
为了在冬天之前为此做好准备，这些动物会吃过量的食物来变胖，在它们在睡觉时这会提供所需的能量。
Other animals adapt. For example, by staying active in winter.
其它的动物会适应。例如，通过在冬天保持活动。
It is often hard for them to find food.
找食物对他们来说通常很难。
So some animals, such as mice, collect extra food before winter, and hide it.
所以有些动物，例如老鼠，会在冬天之前收集好额外的食物，然后把食物藏起来。
When winter comes, they return to their hiding places to eat the food.
当冬天来临，它们会回到它们的藏身之处去吃食物。
Some animals grow thicker fur, or live in tree holes or underground to stay warm.
有些动物会长出浓密的毛发，或者居住在树洞或地下来保暖。
Some birds migrate by flying to a warmer place for the winter, where they can find more food.
有些鸟类会飞到一个更温暖的地方过冬，在那里他们可以找到更多的食物。
Some fly very long distances, including one kind of bird that flies from the remote north of the world, all the way to the distant south.
有些鸟类会飞很长的距离，其中有一种鸟是从地球上遥远的北方一直飞到遥远的南方。
Some birds fly in groups for safety, while others fly alone.
有些鸟类会为了安全而成群地飞行，而其它的一些鸟则独自飞行。
Questions 22-25 are based on the passage you have just heard.
请根据你刚刚听到的文章回答问题22至问题25。
Question 22. What does the speaker say about animals in winter?
问题22. 关于冬天的动物，说话人提到了什么？
Question 23. What do we learn about animals that sleep through winter?
问题23. 我们获知了关于冬眠的动物的什么信息？
Question 24. How do animals like mice adapt to the severe winter?
问题24. 像老鼠这样的动物是如何适应寒冬的？
Question 25. Why do some birds fly in groups when migrating, according to the speaker?
问题25. 根据说话人所说的内容，为什么有些鸟类在迁徙的时候会成群地飞？
