俚语翻译：to play it by ear
到时候看（不确定）
举一反三
内容
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俚语翻译：a cat nap
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俚语翻译：to get cold feet
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俚语翻译：to let your hair down
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play it by ear 形容的是下列哪种状态？
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play it by ear的意思是用耳朵玩。