『新东方在线托福口语』为托福考生准备了ETS托福TPO/Official 50 Task 4口语练习：<img src="/upload/ti/2340000-2341000/2340840/24eb870ebd4a4be6970c95a3ceba6fb1.jpg">
 &nbsp;&nbsp;原文题目答案解析，TPO/Official 50 Task 4口语原文范文音频翻译。

托福TPO/Official 50 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：听一个生物课上的讲座。

Narrator: Listen to a lecture from a Biology class.

教授：我们一直在讨论动物是如何进化出不同的生存方式的，

Professor: So we've been talking about how animals have developed different ways of surviving,

其中一种方法是演化出特殊的身体特征来保护它们免受环境中的危险。

and one way is from having developed special physical characteristics that help protect them from the dangers in their environment.

这些被称为保护性适应，有两种不同的类型。

These are known as protective adaptations, and there are two different kinds.

这意味着它们通过身体结构来保护自己，使捕食者很难接近它们。

that means they protect themselves by having body structures that make it hard for predators to get at them.

其他动物有攻击性的适应能力，

And other animals have offensive adaptations,

body structures that keep predators away.

这是一个有防御适应能力的动物的好例子。

It's a good example of an animal with a defensive adaptation.

你已经知道它有一个坚硬的外壳，覆盖着它的背部和重要的器官。

you already know that it has a hard shell that covers its back and vital organs.

Its shell is its special physical characteristic,

它是如此的强大以至于它不会断裂或裂开，

and it's so strong it won't break or split open,

making it very hard for a predator to get at it.

乌龟的脖子也很灵活，所以它可以把它的头向下缩进壳里。

The turtle also has a flexible neck so it can pull its head down under its shell.

它的腿也可以在外壳下折叠起来，提供更多的保护。

Its legs can also fold up under the shell and provide more protection still.

Alright, but now let's talk about the porcupine.

这是一种利用身体伤害来威胁捕食者从而保护自己的动物。

That's an animal that protects itself with an offensive adaptation by threatening a predator with physical harm.

Uhm...in case you haven't seen a porcupine recently,

想象一下，一只小动物身上长着成千上万个长长的、尖尖的、针状的刺。

just imagine an animal with a small body that is covered with thousands of long, sharp, needlelike quills.

Those quills are its special physical characteristic.

那些尖锐的刺儿会伸展开来，嵌入到捕食者的皮肤里。

those sharp quills come loose and become embedded in the predator's skin.

所以捕食者知道离它远远地，因为它们看到了豪猪的刺，

So predators know enough to stay away because they see the porcupine's threatening quills,

and they don't want to risk being hurt by them.

<img src="/upload/ti/2340000-2341000/2340840/24eb870ebd4a4be6970c95a3ceba6fb1.jpg">
 &nbsp;&nbsp;
 Using points and examples from the lecture, explain two different protective adaptations.
 &nbsp;
 &nbsp;