fruitlessness

n. 无效
无益

例句与用法：

All my efforts were fruitless.

我所有的努力都白费了。

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。

His struggle with adversity is fruitless.

他徒与不幸挣扎而毫无结果。

Their negotiation was fruitless.

他们的谈判没有结果。

词形变化：

副词: fruitlessly | 名词: fruitlessness |