『新东方在线托福口语』为托福考生准备了ETS托福TPO/Official 31 Task 4口语练习：<img src="/upload/ti/2427000-2428000/2427209/06d19eeb10b84964bcc85c6b0e3d15a8.jpg">
 &nbsp;
Us原文题目答案解析，TPO/Official 31 Task 4口语原文范文音频翻译。

托福TPO/Official 31 Task 4口语原文独立/综合口语题目答案解析-范文音频翻译-新东方托福官方网校手机版

旁白：来听生物课上讲座的一部分。

Narrator: Listen to part of a lecture in a Biology class.

教授：即使天气寒冷和白雪覆盖，

Professor: Even though it's cold and snow-covered,

北极有许多种类的动物，它们能够在恶劣的环境中生存下来。

the Arctic houses many species of animals that manage to survive the harsh conditions there.

这些北极动物已经适应了极冷的温度，

These Arctic animals have adapted to the extremely cold temperatures,

主要是因为某些身体特征帮助它们在寒冷的北极气候中生存。

primarily because of certain body features that help them to survive in the cold Arctic climate.

首先，许多北极动物已经在它们的脚上形成了一层保护性的覆盖物。

For one thing, many Arctic animals have developed a protective covering on their feet.

覆盖物通常由毛皮或羽毛组成，

The covering usually consists of fur or feathers,

它在寒冷和动物的皮肤之间起到保护作用。

which act as a protective layer between the cold and the animal skin.

因为动物们在冰雪覆盖的冰面上花费大量的时间，

Since they spend so much of their time on snowy icy surfaces,

不管它们是站在地上还是在水中游泳，

whether they are standing on the ground or swimming in the water,

they can easily lose heat through their feet.

例如，像北极雪鸮这样的鸟类，其身体上的羽毛就像其他鸟类一样。

A bird like the Arctic snowy owl, for example, has feathers on its body the way other birds do.

这隔离和保护脚远离冰冷的地面，

This shields and protects the feet from the icy ground,

所以这种猫头鹰的脚很少接触到雪或冰的表面，

so that very little of the owls foot actually touches snowy or icy surfaces,

Another physical characteristic that some Arctic animals share,

有更小的身体和更小的身体部位。

is having smaller bodies and smaller, shorter body parts.

它们的身体通常比其他动物更紧凑，

their bodies are often more compact than other animals,

and the parts of their bodies that stick out or protrude,

就像腿，耳朵或尾巴更小更短。

like the legs, ears or tails are smaller and shorter.

其结果是，暴露在寒冷空气中的身体表面较少。

And the result is that there is less body surface exposed to the cold air.

不像生活在温暖气候下的大灰狼，

Unlike the larger grey wolves that live in warmer climates,

北极狼的体型相对较小，体积小，能有效地保持热量。

Arctic wolves have relatively small, compact bodies that efficiently retain heat.

They also have smaller ears and shorter legs,

因此，它们比拥有更大的身体或更长的身体部位的动物损失更少的身体热量。

so they lose less body heat than animals with larger bodies or longer body parts.

在常年温度零下的气候中，这是非常重要的。

And in a climate where the temperature is below zero most of the year, that's very important.

<img src="/upload/ti/2427000-2428000/2427209/06d19eeb10b84964bcc85c6b0e3d15a8.jpg">
 &nbsp;
Using the example of the owl and the wolf, explain how two special body features have helped arctic animals adapt to the cold.&nbsp;&nbsp;