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Jyutping gau2 jat1 jat1 si6 gin2
Pinyin jiǔ yī yī shì jiàn

Definitions (Wiktionary)
  1. name
    September 11 attacks; 9/11

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Jyutping gau2 jat1 jat1 si6 gin2
Pinyin jiǔ yāo yāo shì jiàn

Definitions (Wiktionary)
  1. name
    September 11 attacks; 9/11
Examples (粵典–words.hk)
  1. Cantonese
    九一一事件真系一场大浩劫。
    九一一事件真係一場大浩劫。
    gau2 jat1 jat1 si6 gin2 zan1 hai6 jat1 coeng4 daai6 hou6 gip3.
    • The 911 incident is a great calamity.