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Jyutping cong1 hoi2 jat1 suk1
Pinyin cāng hǎi yī sù

Definitions (CC-CEDICT)
  1. a drop in the ocean (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    drop in the ocean; drop in the bucket
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)