2018年托福口语考试题库：蜻蜓是最高效的捕食者

　　新托福口语题目回忆版本一：

　　话题：dragonfly 是most effective predator

　　要点1：compound eyes 视野大

　　例子1：可以看到猎物从各个方向，即使蚊子不说从正面飞来也可以

　　要点2：脑中有个计算系统，可以感知猎物的飞行速度

　　例子2：蚊子分来可以预测path和speed，所以蚊子根本无处可逃。

　　考题解析：

　　先总说整篇文章讲的是dragonfly 是most effective predator的两个理由。 第一个理由是compound eyes给了它broad field of vision，比如它可以从各个方向看到猎物，即使蚊子从正面飞来也可以，都能够精确定位猎物。再说第二个方面是它脑中有个computing system，可以percept the speed of flying prey。比如蚊子来了之后，dragonfly可以预测其path和speed而后进行处我调整以进行捕食，蚊子将无处可逃

　　新托福口语题目回忆版本二：

　　dragonfly有两个body features可以帮助自己有效地捕食。第一，它们有一个很大的眼睛，可以帮助他们看full direction，还举了一个例子说明dragonfly可以在空中看到它们并捕食它们。第二，他们有mental ability， 可以判断飞行或运动中的动物的path、speed，从而捕食他们。

　　托福口语范文一：

　　In the lecture, the professor talks about two reasons why the dragonfly is the most effective predator.

　　The first one is that compound eyes give them a broad field of vision. With the help of compound eyes, the dragonfly can clearly see preys flying from all directions, including in the very front so that no preys will be omitted.

　　The second one is that they have a computing system to predict the flying speed of the preys. This system is sophisticated enough to work out the speed the preys nearby travel at and the dragonfly can make adaption to capture them. For example, when approaching the dragonfly, the mosquitos’ path and speed will be worked out in a short time. And the dragonfly will take actions and the mosquitos have nowhere to hide and finally become meals of the dragonfly.