方小字

1. Behind the Times：過時

例句：One will fall behind the times if one does not acquire new knowledge.

一個人如果不學習新知識，那他將落后于時代。

2. Teach Fish to Swim：班門弄斧

例句：You're just offering to teach fish to swim.

你這是在班門弄斧。

3. Got Your Number：知道你打的什么算盤

例句：I've got your number you're never going to pay me back.

我知道你打的什么算盤——你根本不打算還我錢。