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Jyutping zing3 zing3 ging1 ging1
Pinyin zhèng zhèng jīng jīng

Definitions (Wiktionary)
  1. adv
    seriously; in earnest
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    唔好成日做埋晒啲无谓嘢,正正经经揾啲嘢学下啦!
    唔好成日做埋晒啲無謂嘢,正正經經揾啲嘢學下啦!
    m4 hou2 seng4 jat6 zou6 maai4 saai3 di1 mou4 wai6 je5, zing3 zing3 ging1 ging1 wan2 di1 je5 hok6 haa5 laa1!
    • Don't waste your time on trivial things. Go find something meaningful to learn!