Taivo A Taiwan Mandarin dictionary

咚咚

dōngdōng

ㄉㄨㄥ ㄉㄨㄥ

  1. 1(onom.) thud
  2. 2thumping
  3. 3thudding
  4. 4pounding

Keep 咚咚 and it comes back until you know it.

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