新托福听写训练 第9期

For the next couple of weeks, we will be focusing on how animals communicate with each other.Up to now, we've had a rather narrow view of vocal¹ warnings that animals give each other. Some recent research indicates that this communication is a lot more complex than we've traditionally thought. Let me give you an example, Take prairie dog, of course they are not really dogs at all but wild rodents² who live on the plains in the western part of United States. In case you can't visualize³ them, let me describe them to you. They're about as big as squirrels but without the bushy tail, and unlike squirrels, they live in holes whole in the ground, and they spend a lot of time just outside their holes because they have a lot of enemies: hawks⁴, coyote, human, you name it. When they spot a potential threat, they bark to warn one their neighbors and then they escape down into their holes. big deal you say, well, it turns out they can differentiate⁵ among predators⁷. Researchers have discovered that the bark differs for different predators. Coyote warnings are different from people warning, for instance. But it goes deeper than that, there's actually evidences that their barks differentiate between individual predator⁶ of same species. The researchers found for example, the prairie dogs had a different bark for each member of the research team.

1 vocal   

adj.直言不讳的；嗓音的；n.[pl.]声乐节目

参考例句：

• The tongue is a vocal organ.舌头是一个发音器官。
• Public opinion at last became vocal.终于舆论哗然。

2 rodents   

n.啮齿目动物( rodent的名词复数 )

参考例句：

• Rodents carry diseases and are generally regarded as pests. 啮齿目动物传播疾病，常被当作害虫对待。 来自《简明英汉词典》
• Some wild rodents in Africa also harbor the virus. 在非洲，有些野生啮齿动物也是储毒者。 来自辞典例句

3 visualize   

vt.使看得见，使具体化，想象，设想

参考例句：

• I remember meeting the man before but I can't visualize him.我记得以前见过那个人，但他的样子我想不起来了。
• She couldn't visualize flying through space.她无法想像在太空中飞行的景象。

4 hawks   

鹰( hawk的名词复数 )； 鹰派人物，主战派人物

参考例句：

• Two hawks were hover ing overhead. 两只鹰在头顶盘旋。
• Both hawks and doves have expanded their conditions for ending the war. 鹰派和鸽派都充分阐明了各自的停战条件。

5 differentiate   

vi.(between)区分；vt.区别；使不同

参考例句：

• You can differentiate between the houses by the shape of their chimneys.你可以凭借烟囱形状的不同来区分这两幢房子。
• He never learned to differentiate between good and evil.他从未学会分辨善恶。

6 predator   

n.捕食其它动物的动物；捕食者

参考例句：

• The final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
• Komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴，它是一种令人恐惧的捕食性动物。

7 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》