白费力

beat the air; fish in the air; plough the air; plough the sand

1. 大夏天推销大衣真是白费力气。
   Trying to sell overcoats in midsummer is a real mug's game.
2. 他白费力气想抓住停在花上的蝴蝶。
   He tried in vain to catch the butterfly on the flower.
3. 过去的事哭也是白费力气。
   It is no use crying about the past.
4. 在无人岛上夸耀富有也是白费力气。
   It is of no use boasting of being rich on a desert island.
5. 这都是毫无作用的。告诉你，你是在白费力气。
   It's all to no purpose. I tell you that you are ploughing the sand.

白费的英语翻译：

力的英语翻译：