flog a dead horse[释义] 徒劳无益; 鞭策死马; 白费精力; 作无用功; 网络释义flog a dead horse1. 徒劳2. 徒劳无益3. 枉费心机4. 白费力气双语例句1. It is useless to flog a dead horse. 老调重弹,浪费时间.来自互联网2. Don't try to flog a dead horse. 鞭打死马,无济于事.相关词条to flog a dead horseflogging a dead horsere flogging a dead horseflog a dead horse rehash
