No wonder

We use this expression to say something is not surprising.

我们用这个表达来表示某事完全不意外。

A: The tv's not working.

电视坏了。

B: No wonder - the plug isn't in. Look.

怪不得。看，插座都没插上。

A: I've been up all night.

我昨天一夜没睡。

B: No wonder you're tired.

怪不得你这么累。