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Jyutping siu2 mou4 gin3 daai6 mou4
Pinyin xiǎo wú jiàn dà wú

Definitions (Wiktionary)
  1. phrase, idiomatic
    to pale in comparison

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Jyutping siu2 mou4 gin3 daai6 mou4
Pinyin xiǎo wū jiàn dà wū

Definitions (CC-CEDICT)
  1. lit. minor magician in the presence of a great one (idiom)
  2. fig. to pale into insignificance by comparison
Definitions (粵典–words.hk)
  1. 語句
    比喻​能力​或者​規模​相差​甚遠​,​無​法相​提並論
    to be dwarfed by others