休閑對話：樹為什么是圓的?

Ann: Hello, Let me give you a test.

嗨，讓我考考你吧.

Lily: Ok, just let it out.

好啊，說吧。

Ann: This morning, my teacher asked us why trees are round not square. Do you know why?

今天早上，我的老師問我們說，樹為什么是圓的而不是方的呢?你知道為什么嗎?

Lily: Let me see. I think it is just the order of the nature. They are born round.

讓我想想。我想這是自然規(guī)律吧，樹木天生就是圓的啊!

Ann: Yeah, I know, but why they are cut out in round shape.

嗯，我知道。但為什么天生就是圓的呢?

Lily: Err, sorry, I can’t figure it out. Could you give me a hint?

呃，抱歉，我還是想不出來. 能不能給點提示啊?

Ann: Have you ever found that the corners of the square things always damage easily?

你有沒有發(fā)現(xiàn)正方形的東西的角都很容易損壞呢?

Lily: Yes, some of the corners even have been rounded off.

對啊，有的角甚至還被磨圓了呢。

Ann: The trees are born round so that they can protect themselves.

所以，樹木是因為要保護自己才會長成圓的。

Lily: I got it, the survival of the fittest.

我明白了。適者生存嘛。