confidant [,k?nfi'd?nt]

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心腹（名詞）

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(noun) A highly-trusted person to whom important secrets can be told.

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EXAMPLE: His company's elderly accountant was the wary executive's only confidant.

公司的老會(huì)計(jì)師是這位謹(jǐn)慎的高管的唯一心腹,。

game face

停止工作（俚語(yǔ)）

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The serious, intense facial expression of a professional athlete during a competition; an outward appearance that reveals nothing about one's internal feelings.

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EXAMPLE: Going into the important negotiation yesterday I was very nervous, but I put on my game face so no one could tell how worried I was.

昨天在進(jìn)入重要談判時(shí)，我非常緊張,，但我故作輕松,，所以沒(méi)人看出我有多焦慮。