| 短语 | be an ass for one’s pains |
| 释义 | be an ass for one’s pains徒劳无功;枉费心机：A businessman has calculated market supply and demand for a long time，but he still sustains losses in his business，he is really an ass for his pains. 一个商人对于市场供需计算了很长时间，但他的买卖仍然赔了钱，他真是枉费心机。 |
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