| 释义 |
文馨英漢☞白費力氣白费力气phr.number the sand做徒劳无功的事，白费力气carry coals to Newcastle多此一举，徒劳无功，白费力气bite a file白费力气，徒劳无功白费力气1. to waste one's energy; to plough the air; to gnaw a file; to bite on granite; to bang (or knock) one's head against a brick (or stone) wall; to be |