尾下覆羽

lower tail coverts的用法和样例：

例句

Its tail is long and black with gray uppertail coverts and orange brown undertail coverts.尾羽修长黑色，尾上覆羽灰色，尾下覆羽橙褐色。

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趣味英语

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英文原版对话1000个:788 Diabetes

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