racking

['rækiŋ]

adj.极为痛苦的, 难以忍受的
动词rack的现在分词

例句与用法：

I've been racking my brains (trying) to remember his name.

我一直都在绞尽脑计回想他的名字。

Even after racking his brains he couldn't think of a single example.

即使绞尽脑汁，他还是连一个例子也想不出来。

详细释义：

a.

拷问的; 折磨人的