The moribund Post Office Advisory Board was replaced.

这个不起用的邮局员会已被替换。

What I said made practically no impression on him.

我的话对他简直不起用。

The dye doesn't take in cold water.

那种染料在冷水中不起用。

Unfortunately their plan misfired badly.

可惜他们的计划完全不起用。