情景对话：

A: Don't speak loudly; you'd better behave yourself.

别那么大声，你最好放规矩一点。

B: There you go again!

你又来了。

A: There's no telling when the teacher will come.

说不定老师会来的。

B: It's no big deal!

没什么大不了的！

一， 词海拾贝

There is no telling…：难以预料…….，很难说……

Exp. There is no way one can be sure; no one knows or can tell.（难以预料……，很难说……）

e.g. He's already very volatile at the moment—there is no telling how he'll react to bad news like this.

此刻，他的情绪已经反复无常了，那就不知道他会对这样的坏消息作何反应。

e.g. Unfortunately, there's no telling if such an effort will actually translate to a meaningful, long-lasting improvement in the economy.

不幸的是，这种努力是否会真正转化为在经济上的有意义的、持久的改善，目前还不得而知。

e.g. There is no telling what he may do when he gets angry.

很难说他发火的时候会做出什么样的事情出来。

e.g. There’s no saying what will happen.

很难说将来发生什么事情。

二， 语汇积累

1. no big deal：没有什么了不起的

e.g. It's no big deal that his car is more expensive than mine.

他的车比我的贵有啥了不起。

e.g. It's no big deal! I can find another job anytime.

没什么大不了的！我随时都可以找到另一份工作。

e.g. Today I want to tell you three stories from my life. That's it. No big deal. Just three stories.

今天，我想告诉你们我生命中的三个故事，并非什么了不得的大事件，只是三个小故事而已。

2. behave oneself：行为举止规矩

e.g. If parents don't teach their child how to behave himself, he will do anything at will.

假如父母亲对孩子的举止教导无方，孩子则会肆意行事。

e.g. He behaves himself so as not to give offence to others.

他举止小心，以便不冒犯他人。