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Jyutping waan4 lau4
Pinyin huán liú

Definitions (粵典–words.hk)
  1. 名詞
    地球表面​上大規​模​嘅​空​氣​流​動
    atmospheric circulation
Definitions (Wiktionary)
  1. noun
    circulation
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)