in vain

[in'vein]

徒然, 白费, 无效

例句与用法：

Day after day she waited in vain for him to telephone her.

日复一日，她徒劳地等待他的电话。

They endeavoured to make her happy but in vain.

他们尽量使她快乐，却徒劳无功。

All our work was in vain.

我们的工作全都白干了。

I sought to persuade him, but in vain.

我试图说服他，但无效。

He tried in vain to catch the butterfly on the flower.

他白费力气想抓住停在花上的蝴蝶。

All his father's exhortations were in vain.

他父亲的一切劝告都无效。

We tried in vain to make him change his mind.

我们想使他改变主意，结果是白费心机。

详细释义：

徒劳

Their efforts were not in vain.

他们的努力没白费。