白费

1. 我们想使他改变主意，结果是白费心机。
   We tried in vain to make him change his mind.
2. 老师发现他是在白费口舌；孩子们根本不相信他。
   The teacher saw that he was wasting his breath; the children refused to believe him.
3. 他们听不进去，不必和他们白费唇舌了。
   They won't listen, so don't waste your breath telling them.
4. 我们全部的努力都白费了。
   All our efforts were wasted.
5. 他的所有努力都白费了。
   All his efforts were wasted.

白的英语翻译：

费的英语翻译：