介绍:
Rack your brains 绞尽脑汁；搜肠刮肚
You don’t have to rack your brains to get the answer to that simple question. 你用不着绞尽脑汁就可以想出那个简单问题的答案
I`ve been racking my brains all day but I can`t remember her name. 我绞尽脑汁想了一整天，怎么也想不起她的名字来
She racked her brains, trying to remember exactly what she had said. 她绞尽脑汁，想要回忆起她到底说过些什么
