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Jyutping gwong1 jam1 jam5 jim5
Pinyin guāng yīn rěn rǎn

Definitions (Wiktionary)
  1. phrase, idiomatic
    time flies; tempus fugit
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

光陰荏苒 [-阴--]

Jyutping
Pinyin guāng yīn rěn rǎn

Definitions (CC-CEDICT)
  1. How time flies! (idiom)