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(单词翻译:双击或拖选)
If you have a cat, it's likely that at some point you've seen it do this: while playing with your foot it suddenly dropped to its side, latched1 on with its front claws and began a coordinated2 kicking motion with both back legs.
The cat probably gave you a good four or five swats before letting go. From a human point of view this looks like great fun--a real rough-and-tumble kind of game. But where does it come from?
Before giving an answer, let's think for a second about the kind of thing we can learn even from so commonplace an event. Housepets are not toys; although they are domesticated3 and, in the instance of cats, much smaller than their wild counterparts, it's a mistake to regard them as fundamentally different from wild animals. They share millions of years of evolutionary4 history, and their behaviors--even playful ones--are in many cases behavior that was very useful in the wild.
So, think again about that front-claw grab connected with a back-claw kick that your cat does from time to time. You may see it in a new light when you realize that the cat is executing a very effective device for killing5 prey6 or enemies: hold the other animal's stomach in place while you disembowel it.
Of course, that doesn't mean your cat is really trying to hurt you; but it does show us that playful behavior in animals --and, oftentimes, in humans--is not simply nonsense. In many cases it is a practice run for learning more useful skills--even deadly ones.
点击收听单词发音
1 latched | |
v.理解( latch的过去式和过去分词 );纠缠;用碰锁锁上(门等);附着(在某物上) | |
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2 coordinated | |
adj.协调的 | |
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3 domesticated | |
adj.喜欢家庭生活的;(指动物)被驯养了的v.驯化( domesticate的过去式和过去分词 ) | |
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4 evolutionary | |
adj.进化的;演化的,演变的;[生]进化论的 | |
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5 killing | |
n.巨额利润;突然赚大钱,发大财 | |
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6 prey | |
n.被掠食者,牺牲者,掠食;v.捕食,掠夺,折磨 | |
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