休闲对话：树为什么是圆的?

Ann: Hello, Let me give you a test.

嗨，让我考考你吧.

Lily: Ok, just let it out.

好啊，说吧。

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

今天早上，我的老师问我们说，树为什么是圆的而不是方的呢?你知道为什么吗?

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

让我想想。我想这是自然规律吧，树木天生就是圆的啊!

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

嗯，我知道。但为什么天生就是圆的呢?

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

呃，抱歉，我还是想不出来. 能不能给点提示啊?

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

你有没有发现正方形的东西的角都很容易损坏呢?

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

对啊，有的角甚至还被磨圆了呢。

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

所以，树木是因为要保护自己才会长成圆的。

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

我明白了。适者生存嘛。