beat a dead horse
US /biːt ə dɛd hɔrs/
UK /biːt ə dɛd hɔrs/
成语
1.
白费力气, 徒劳无功
to waste effort on something that is no longer possible or cannot be changed
示例:
•
Trying to convince him now is just beating a dead horse; he's made up his mind.
现在试图说服他只是白费力气；他已经下定决心了。
•
Let's move on to a new topic; we're just beating a dead horse with this argument.
我们换个新话题吧；我们只是在为这个争论白费力气。
在 Lingoland 学习这个单词