rack one's brains

短语

绞尽脑汁

词形变化

racked one's brains racking one's brains racks one's brains 三单 racks one's brains racking one's brains 现在分词 racked one's brains 过去式 racked one's brains 过去分词

释义与例句

v.
  1. 1.

    Alternative form of rack one's brain.