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旁白：听一个有关生物课程的讲座。

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

教授：我们都知道昆虫喜欢吃植物，

Professor: We all know that insects like to eat plants,

但是一些植物已经能够……开发出保护自己免受昆虫侵害的方法。

but some plants have been able to... to develop ways to protect themselves from insects.

今天，我要讲一些植物保护自己的方法。

Today, I'm going to talk about some ways plants defend themselves.

现在有些植物具有防止昆虫落在它们身上的物理特征，

Now some plants have physical features that prevent insects from landing on them,

它的叶子上到处都是尖尖的毛。

Its leaves have little spiky hairs all over them.

它们就像从植物中伸出来的尖刺，它们的数量如此之多，以至于它们阻止昆虫落在叶子上。

They're like spikes sticking out of the plant that are so numerous and dense that they prevent insects from landing on the leaves.

基本上，没有空间让昆虫着陆。

Basically, there's just no room for the insect to land.

And since insects can't land on the leaves,

因此，这些小毛作为一种物理特征，有助于保护龙珠果免受昆虫的侵害。

So the little hairs serve as a physical feature that helps protect the passion plant from insects.

但是其他植物通过化学防御来保护自己，就像马铃薯一样。

but other plants protect themselves using chemical defenses, like the potato plant.

当一种昆虫攻击它时，马铃薯能够在它的叶子系统中释放一种化学物质，开始吃树叶。

The potato plants able to release a chemical throughout its leaf system whenever an insect attacks it, starts eating leaf.

所以，如果昆虫开始吃马铃薯的叶子，就会引起植物产生反应，

So, say an insect starts eating a potato plant's leaf, that will cause the plant to react,

通过在叶系统中释放一种化学物质。

by releasing a chemical throughout its leaf system.

The insects swallows this chemical as it eats,

这种化学物质阻止了昆虫想要吃掉更多的植物。

and this chemical discourages the insect from wanting to eat any more of the plant.

嗯，这种物质让昆虫有饱腹感，

Well, the substance makes the insect feel full,

马铃薯保护自己不受昆虫的伤害。

the potato plant protects itself from insects.

<img src="/upload/ti/2426000-2427000/2426908/dd336c5b18a542539a865c7230abd1f8.jpg">
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Using points from the lecture, explain how the passion plant and the potato plant defend themselves from insects. &nbsp;
 
 
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