blow at a cold coal
英
美
- 白费力气；做徒劳无益的事
双语例句
- To argue with such a marl is like beating the air.
跟这号人辩论是白费力气。 - It is of no use boasting of being rich on a desert island.
在无人岛上夸耀富有也是白费力气。
用法讲解
- a cold coal to blow at 无成功希望的工作...
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