【英语词汇】“白费”用英语怎么说？

“白费”用英语怎么说？

in vain 徒然，枉然

All our work was in vain.

我们所有的工作都白费了。

A: I' ve tried many ways to cheer her up, but it's in vain.

我试图用不同的方法让她振作起来，但是根本不起作用。

B: I’m willing to comfort her too, but what shall I do?

我也想去安慰她一下，可是我该怎么做呢？

A: Now I think it's better to leave her alone.

我想我们现在最好还是不要去打扰她。

B: Maybe.

也许吧。