The suit’s W-collar seems to have developed from turning down the stand-up collar of a frock coat, which in turn derived from army and naval wear.

把礼服大衣竖着的领子翻下来就形成了W型的领口，反过来礼服大衣又来源于陆军和海军的军装。

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Turn a collar down; a collar that turns down.

翻下衣领；能翻下的衣领。

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Turn a collar down; a collar that turns down.

翻下衣领；能翻下的衣领。

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