来去无踪

lai2 qu4 wu2 zong1

come without a shadow, leave without a footprint (idiom); to come and leave without a trace

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来去无踪

lái qù wú zōng

come and go without leaving a trace; come and go mysteriously leaving no trace

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來去無蹤|来去无踪 [lái qù wú zōng] ► come without a shadow, leave without a footprint (idiom); to come and leave without a trace