『新东方在线托福口语』为托福考生准备了ETS托福TPO/Official 36 Task 4口语练习：<img src="/upload/ti/2427000-2428000/2427292/c2b45e571a07427c8e07c7d62238d5e0.jpg">
<br>Using the ex原文题目答案解析，TPO/Official 36 Task 4口语原文范文音频翻译。

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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：我们知道在很多气候下，动物不得不演化出一些策略

Professor: So we know animals in many climates have to develop strategies,

我们知道在很多气候下，动物不得不演化出一些策略

um...ways to protect themselves when the weather becomes especially hot and dry in the summers.

让我们讨论一个小生物，一只蜗牛，所做的策略。

Let's start talking about how one small creature, a snail can do this.

我们来讨论一种小型生物，蜗牛是如何做的

Now, as you know, a snail is a very small creature,

柔软湿润的身体，大部分都被坚硬的外壳保护着。

with a soft, moist body, most of which is protected by a hard shell.

蜗牛是动物的一个很好的例子，它已经发展出了应对高温、干旱或缺水的策略。

A snail is a good example of an animal that has developed certain strategies for coping with high temperatures and drought or lack of water.

首先是为了避免过热，当太阳出来的时候，

First to avoid the heat, when the sun comes out,

snails move into the shelter of vegetation,

你知道，植物或树叶，要离开太阳，进入阴凉处。

you know, plants or leaves, to get out of the sun and into the shade.

当然，在阳光下的地面会变得非常热

Now, of course, the ground can become very hot in the sun,

所以蜗牛会从地面向上移动到温度较低的地方。

So snails will move up off of the ground to places where it is cooler.

它们可能会把自己固定在一堵墙或一棵树上，那里比地面更凉爽。

They may attach themselves to a wall or a tree where it is cooler than on the ground.

Now it's not just heat that snails need to worry about,

由于缺水，它们也需要避免干燥。

they also need to avoid drying out due to lack of water.

所以在一个非常温暖，干燥的日子里或者在夏天的时候，

So during a really warm, dry day or during the summer months,

蜗牛分泌一种粘粘的分泌物，由钙组成，

snails secrete a sticky, slimy substance, made up of calcium,

它覆盖壳的开口，盖上盖子，把它合上。

and it covers the opening of their shell, covers and closes it up.

这样可以保持壳内的水分，防止蜗牛的干燥。

This keeps the moisture inside the shell and prevents the snails from drying out.

蜗牛可以呆在壳里，像这样在很长一段时间内封闭起来，

Snails can stay inside their shells, closed up like this for a long time,

如果是一个非常干燥的夏天，甚至可以达到几个月。

even several months if it's a really dry summer.

它们的身体，嗯，所有的东西都变慢了，所以它们不需要食物。

Their bodies, well, everything slows down and so they don't need food.

它们可以依靠储存的食物生存。

They can survive on what food they've stored up.

But when it rains and water is available again,

the snail opens up its shell to get some.

<img src="/upload/ti/2427000-2428000/2427292/c2b45e571a07427c8e07c7d62238d5e0.jpg">
<br>Using the examples from the professor's lecture, explain how snails survive in hot and dry climates.