费力

1. 过去的事哭也是白费力气。
   It is no use crying about the past.
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. 要我承认错了，是很费力的。
   It was painful to admit that I was wrong.
4. 虽然这项工作很费力，他仍然很快就做完了。
   Although the work was arduous, he finished it in a short time.
5. 我费力重新安排时间，他却连想都不想去（喝）另一家。
   I take the trouble to rearrange my schedule, but he do not even want to go another round.

力的英语翻译：