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Jyutping dou2 wun6
Pinyin dào huàn

Definitions (Wiktionary)
  1. verb
    to rearrange (sequence, order, etc.); to replace
  2. verb
    to rotate; to take turns

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Jyutping dou2 wun6
Pinyin dǎo huàn

Definitions (CC-CEDICT)
  1. to take turns
  2. to rotate (responsibility)