在这个物竞天择，适者生存的社会，动物是如何保护自己的呢?动物也进化出了一种新的技能，保护色，随着环境的变化，动物也可以变换不同的颜色来保护自己。你知道吗?现在就跟着前程百利小编一起来看看这则托福口语备考资料吧!希望可以帮助大家在托福口语考试中取得好成绩!
Reading Part: Revealing Coloration
Many animals use coloration to protect themselves from predators. One defensive strategy involving the use of coloration is what is known as revealing coloration. Animals employing this strategy have an area of bright color on some part of their body; this bright color is usually hidden from predators’ view. When approached by a predator, the animal suddenly reveals the area of bright color; this unexpected display of color startles or confuses the predator and provides the would-be-prey with an opportunity to escape.
Listening Part: Now listen to part of a lecture from a biology class.
(male) There’s a large tropical insect called the Peanut Bug. Yes, like the peanuts you eat. Um, and the Peanut Bugs front wings are colored so they blend in with their surroundings. But its back wings, which are usually closed and hidden, have these bright colorful spots on them. And when the Peanut Bugs are attacked, it suddenly opens its back wings and out pop these bright colors. And that surprises the predator and gives the Peanut Bug a chance to get away.
Um, then you have a butterfly called the morpho butterfly. And parts of the morpho butterfly wings are very shiny. They reflect a lot of sunlight. When this butterfly is resting, this shin y part of its wings is hidden. Now morpho butterflies are often attacked by birds. So when a bird approaches, the morpho flies away. And when the morpho flaps its wings, all the bird can see are flashes of light reflected from the morpho’s wings. Those flashes of light make it very difficult for the bird to follow the morpho. And the morpho is usually able to get away.
一.在文本中有一些词汇对于我们解题很重要，现在就跟着前程百利小编一起来看看吧!
(1)和生物类有关系的一些词汇
1. coloration：n. 着色;染色
Glare from this sunlit portion will make any coloration within the umbra elusive at best.
2. reveal：v. 揭示;展现
The AP confirmed the identity of the women but is not revealing their names.
3. predator：n. [动] 捕食者
With no natural predators on the island, the herd increased rapidly.
4. defensive：adj. 自卫的;防御用的
Defensive end Tyrone Crawford picked up the bouncing ball and ran 32 yards for a touchdown.
5.confuse：vt. 使混乱;使困惑
I always confuse my left with my right.
(2)帮助我们解题的重要词汇
1. escape：vt. 逃避，避开
A prisoner has escaped from a jail in northern Texas.
2. tropical：adj. 热带的;热情的;酷热的
You know, in case they show her doing the limbo on a tropical isle somewhere.
3. peanut：n. 花生
Randy Napier's mother died in Ohio after eating peanut butter linked to Parnell's peanuts.
4 blend：vi. 混合;协调
The public areas offer a subtle blend of traditional charm with modern amenities.
5. shiny.：adj. 有光泽的，擦亮的
Her blonde hair was shiny and clean.
6. approach：vi. 靠近
The non- linear approach capability and self-learning capability of neural net are very strong.
二.还有哪些词汇经常在这类题目中出现呢?
1.mammal: . [脊椎] 哺乳动物
Metacaspase is a kind of mammal caspases homolog which coded by the YCA1/MCA1 gene.
2. species: n. [生物] 物种;种类
It appears that the species hi this area are very abundant.
3. evolve: vt. 发展，
As a complex adaptable system, economic organizations in CE evolve continuously.
4. captive: adj. 被俘虏的;被迷住的
And once again, the economy will be held captive unless they get their way
5. breeding: v. 生产;培育;
It's a sign of good breeding to know the names of all your staff.
以上就是前程百利小编要和大家分享的托福口语之生物类中经常出现的词汇，希望可以帮助大家备考，如果想了解更多考试资讯，欢迎登陆前程百利论坛，最后预祝每一位考生都能考出好成绩。
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