偶尔使用。在柯林斯辞典中， moult 是3万个最常用词之一。
英式英语: moult VERB
When an animal or bird moults, it gradually loses its coat or feathers so that a new coat or feathers can grow.
Finches start to moult at around twelve weeks of age.
moult 的定义—— 柯林斯 英语词典
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