I have a black cap.

我有一顶黑色的帽子。

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Would you like a black cap?

你想要一顶黑色的鸭舌帽吗？

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Look at the cat.It has a black cap on its head.

看看那只猫，它头上戴着一项黑帽子。

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And here in the middle of the page a little ways down: My love's striped black-and-white cotton frock, jaunty blue cap, white socks and brown moccasins were not quite in keeping with the large, beautifully cut aquamarine on a silver chainlet which gemmed her throat, a spring rain gift from me.

在这一页中间偏下的地方：,我的小情人穿着黑白条子的棉布裙，带着鲜艳的蓝色帽子，白袜子和亮皮鞋与她脖子上那条优美的,蓝宝石项链有些不协调,这是由于那场春雨我送给她的礼物。

耶鲁公开课 - 1945年后的美国小说课程节选

He gave a black cap with the initials to his late friend's father.

WSJ: Keegan Bradley shoots course-record 60 at Nelson

Tsarnaev, who had appeared in surveillance photos wearing a black cap and was identified as Suspect No. 1, died days after the April 15 bombing, which killed three people and injured more than 260 others.

NPR: Uncle Arranging Boston Bomb Suspect's Burial Rites

He was wearing a black baseball cap, and a black or dark coloured leather jacket with red piping.

BBC: Man sought over Dorset swan crossbow attack