『新东方在线托福口语』为托福考生准备了ETS托福TPO/Official 57 Task 3口语练习：Root Communication
All plants need water in order to grow. In desert environments, however原文题目答案解析，TPO/Official 57 Task 3口语原文范文音频翻译。

托福TPO/Official 57 Task 3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：现在，听一段植物课讲座的节选。

Narrator: Now listen to part of a lecture in a botany class.

教授：好，就这个话题我们举个例子。一直以来，研究者们在研究一种沙漠植物，这种植物叫杂酚树。

Professor: Ok, so here's one example of this. Researchers have been studying a particular plant that lives in the desert. It's called a creosote plant.

你看到杂酚树的时候，马上就会意识到它生长得有些不寻常。它们和别的植物距离间隔非常远。事实证明，这是有原因的。

Now, when you look at creosote plants, you notice something unusual about them right away. You see that they're spaced far away from other plants. And as it turns out, there's a reason for that.

和其他植物类似，杂酚树的根系也深埋地下、能够汲取植物生存所需的地下水。

Like other plants, a creosote plant has a root system underneath the ground that provides the plant with access to the water the plant needs to survive.

这种植物有个特殊的方法保护它根系周围的空间。或者更确切地说，是保护它根系周围的水资源。

And the creosote plant has a special way of protecting the space around its roots. More specifically of protecting the water in the space around its roots.

这种方法就是，无论何时只要其他植物的根部靠近它，杂酚树根就会释放一种化学物质。当其他植物的根部和这种化学物质接触时，它们就会停止朝向杂酚树根生长、转而向反方向生长。

What it does is whenever the roots of other plants start growing too close, the roots of the creosote release a chemical. When the roots of the other plants come into contact with this chemical, they stop growing toward the creosote roots and start growing in some other direction away from the creosote plant.

所以，通过这种方式，杂酚树释放的化学物质就好像在对其他植物的根部说：“这是我的空间、我的水源”。其他植物接收到这个信号，就会离开这片空间。

So in a way, the creosote roots with this chemical they release are telling the roots of the other plants," This is my space and my water." And the other plants get the message and move away.

这样，杂酚树的根部周围总能有充足的空间。在干旱的沙漠环境中，这是个非常大的优势。

So this way, the roots of the creosote plant always have plenty of space around them. And in a dry desert climate, that's a big advantage.

Root Communication
All plants need water in order to grow. In desert environments, however, water is especially scarce. One way that some desert plants attempt to secure an adequate water supply is by maintaining a certain distance between themselves and other plants that might try to compete for the same water. They maintain this distance through a process known as root communication. That is, the roots of one plant communicate with the roots of another plant in order to control the amount of distance separating them. In this way, the communicating plant is able to protect its precious water supply.&nbsp;

 <img src="/upload/ti/sardine/2598000-2599000/2598389/9330afd8a5fb4a40add2a2e80dd71c72.png"> &nbsp;
 Using the example of the creosote plant from the lecture, explain how root communication helps desert plants to survive.