1. flog a dead horse : 徒劳；

1. flog

1. Frequently slaves were flogged.
    奴隶们常受鞭打。

1. 你揮了揮手上的鞭子：flip 你拍拍你身上的灰尘. | flog 你挥了挥手上的鞭子. | flop 你扑通地跌了一跤.

2. (用鞭、棍等)抽打：file向......提出控告 | flog(用鞭、棍等)抽打 | flogging抽打

3. 鞭打/鞭笞/挞/棰：floeberg /小冰山/ | flog /鞭打/鞭笞/挞/棰/ | flogging /鞭打/

1. 出售;卖掉
    If someone tries to flog something, they try to sell it.

公共查询·英语单词大全

    e.g. They are trying to flog their house.
           他们正试图卖掉房子。

2. 鞭笞;棒打
    If someone is flogged, they are hit very hard with a whip or stick as a punishment.

flog

    e.g. In these places people starved, were flogged, were clubbed to death...
           在这些地方，人们忍饥挨饿，遭受鞭打，甚至会被乱棍打死。
    e.g. Flog them soundly.
           好好鞭打他们一顿。

3. 做徒劳无益的事;白忙活
    If you say that someone is flogging a dead horse, you mean that they are trying to achieve something impossible.

1. beat severely with a whip or rod

    e.g. The teacher often flogged the students
           The children were severely trounced

    Synonym: weltwhiplatherlashslashstraptrounce

2. beat with a cane

    Synonym: canelambastelambast