n.衰落；虧缺；變?nèi)?/p>

v.變小；虧缺；呈下弦

By now the power of the Roman Empire was on the wane. 到這時(shí)，羅馬帝國已日益衰敗。

Why should the moon have wax and wane? 為什么一定會(huì)月有陰晴圓缺?

The sick man's strength is on the wane. 病人的體力越來越弱。

The government's popularity is on the wane. 政府的聲望日益低落。

As time went on, so their hopes began to wane. 隨著時(shí)間的消逝，他們的希望開始變得渺茫。

The moon waxes and wanes every month. 月亮每個(gè)月都有盈虧。

When the moon is at its full, it begins to wane. 月盈則虧。