Maybe my worst mistake as a do-it-yourself driving instructor was buying a "Student Driver" sign that sits on top of the car like a yellow hat.

也许作为一个自学驾驶的教官，我最大的错误就是买了一个“学车”的标志贴在车顶上。那看上去就象一个黄帽子。

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She spotted him immediately among the people in the railway station, because he was wearing his yellow hat.

她立刻在火车站的人群中认出了他，因为他戴着黄色的帽子。

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The boy is wearing a yellow hat.

那男孩正在戴一顶黄色的帽子。

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Ogura, standing out in Rockefeller Center with a bright yellow blazer and black cloche hat, said the event's appeal lies in its accessibility: It's an opportunity for the general public to connect with the seemingly intimidating fashion community on a more personal level.

CNN: Style mavens flock to Fashion's Night Out

He is described as white, of medium to heavy build, wearing dark clothing with a black hat or hood and a sleeveless, yellow high-visibility jacket.

BBC: Colin Hall

Detectives said they believed the suspect was white, of medium to heavy build, and was wearing dark clothing with a black hat or hood and a sleeveless, yellow high-visibility jacket.

BBC: Colin Hall