Taivo A Taiwan Mandarin dictionary

來歷不明

láilìbùmíng

ㄌㄞˊ ㄌㄧˋ ㄅㄨˋ ㄇㄧㄥˊ

Simplified 来历不明

  1. 1(idiom) of unknown origin; of dubious background

Keep 來歷不明 and it comes back until you know it.

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