绞尽脑汁

We’re all scratching our heads for an answer to the problem.

为了找到这个问题的答案我们都绞尽脑。

He had to rack his brains to solve that complicated problem.

绞尽脑去解决那个复杂问题。

His classmates were labouring with elementary algebra.

的同学们正在绞尽脑地演算初等代题。

He puzzled himself over the matter.

对那件事绞尽脑。

She is worrying the problem out.

她正在绞尽脑解决这个问题。

I’ve been racking my brains all day trying to remember his name.

我一整天都绞尽脑，回忆起的名字。

All night I have been tossing and turning racking my brains to think what could have possessed the young man to kill himself.

整整一晚我辗转反侧, 绞尽脑, 弄明白是什么原因竟能促成这个年轻人自杀。