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Jyutping sai3 bat1 ho2 dong1
Pinyin shì bù kě dǎng

Definitions (Wiktionary)
  1. phrase, idiomatic
    fierce and overwhelming; swift and unstoppable

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Jyutping sai3 bat1 ho2 dong1
Pinyin shì bù kě dāng

Definitions (CC-CEDICT)
  1. impossible to resist (idiom); an irresistible force
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #3731