| 词汇 | in vain |
| 释义 | in vainin vain1.■白费地, 徒劳无益地We tried in vain to make him change his mind.我们试图使他改变主意, 结果是白费心机。2.■无效果的, 无用的It was in vain that we tried to find his mother.我们百般设法找他的母亲, 但毫无结果。 |
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