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Jyutping jat1 lei5 tung1 , baak3 lei5 ming4
Pinyin yī lǐ tōng , bǎi lǐ míng

Definitions (Wiktionary)
  1. phrase, idiomatic
    grasp this one thing and you'll grasp everything
    (syn.) 一法通, 萬法通, 万法通
    • 一理通百理明,明白了计算可变简单。
      一理通百理明,明白了计算可变简单。
      jat1 lei5 tung1 baak3 lei5 ming4, ming4 baak6 liu5 gai3 syun3 ho2 bin3 gaan2 daan1.
      X

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Jyutping jat1 lei5 tung1 baak3 lei5 ming4
Pinyin yī lǐ tōng , bǎi lǐ míng

Definitions (CC-CANTO)
  1. being able to understand one logic, reveals complete sense to hundreds of reasons or factors
Examples (粵典–words.hk)
  1. Cantonese
    一理通,百理明。
    一理通,百理明。
    jat1 lei5 tung1, baak3 lei5 ming4.
    • grasp the underlying principle, then you will understand everything