廢寢忘餐 [ㄈㄟˋ ㄑㄧㄣˇ ㄨㄤˋ ㄘㄢ; fei4 qin3 wang4 can1] to neglect sleep and food (idiom); to skip one's sleep and meals to be completely wrapped up in one's work ◄ ►
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