He's flogging a dead horse in trying to persuade people to use canals instead of roads.
他拼命地劝人不要使用公路而去使用运河,真是枉费口舌.
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Stop arguing ! You have won your point. You are just beating a dead horse.
我一直想说服鲍勃和我们一起来这里 跳舞,但这是在白费口舌,因为他说他不喜欢.
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Trying to get a financial contribution from Mark is flogging a dead horse.
企图从迈克那得到财政援助是徒劳无益的.
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RF:Horse puckey!You think I'd come from the dead to warn you about a lame chimera??
胡扯!你以为我从阴间来就是为了叫你当心那只废物奇美拉的吗?
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I'd call him a sadistic, hippophilic necrophile, but that would be beating a dead horse.
我可以骂他是虐待狂或者变态恋尸狂, 但那只是对牛弹琴.
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