wild goose chase

• n. 徒劳的搜索(劳而功的事)

wild goose chase的用法和样例：

例句

1. The reporter was sent on a wild goose chase, for the monster he was to investigate had never really existed.
   记者被派了去作徒劳无益的调查，因为他要查寻的怪物根本不存在。