beat a dead horse
基本解释
- 白费口舌；徒劳；在已经失去意义的问题上白花力气
英汉例句
- I hate to beat a dead horse, but it is very important that you understand this before you leave.
我不想多此一举，但你离开以前必须了解这个。
putclub.com
双语例句
词组短语
- beat t a dead horse 白费劲
- to beat a dead horse 白费力气
- Don 't beat a dead horse 别再做无用之功
短语
英英字典
- to waste effort on something when there is no chance of succeeding