adj.不成功的；无结果的
用作形容词 (adj.) Our efforts to persuade her proved fruitless.
我们努力说服她，但毫无成效。
His effort to woo her to his side prove fruitless.
他试图说服她站到自己一边的努力徒劳无功。
So far the search for the missing boy has been fruitless.
到目前为止，还没有找到那失踪的男孩。
Their negotiation was fruitless.
他们的谈判没有结果。
His struggle with adversity is fruitless.
他徒与不幸挣扎而毫无结果。
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