Taivo A Taiwan Mandarin dictionary

夜不成眠

yèbùchéngmián

ㄧㄝˋ ㄅㄨˋ ㄔㄥˊ ㄇㄧㄢˊ

  1. 1to be unable to sleep at night

Keep 夜不成眠 and it comes back until you know it.

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