Her popularity has been on the wane for some time.

她的人气一段时间以来江河日下。

Was his love already on the wane?

他的爱情已经衰减了吗？

The sick man's strength is on the wane.

病人的体力越来越弱。

Her interest in the project is on the wane.

她对这个项目的兴趣正在减弱。

The truth is that pandemics are on the wane.

事实是世界性大流行的可能正在衰退。