beat a dead horse
基本解释
- 白費口舌；徒勞；在已經失去意義的問題上白花力氣
英汉例句
- I hate to beat a dead horse, but it is very important that you understand this before you leave.
我不想多此一擧，但你離開以前必須了解這個。
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雙語例句
词组短语
- beat t a dead horse 白費勁
- to beat a dead horse 白費力氣
- Don 't beat a dead horse 別再做無用之功
短語
英英字典
- to waste effort on something when there is no chance of succeeding