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Jyutping loeng4 si1 jik1 jau5
Pinyin liáng shī yì yǒu

Definitions (CC-CEDICT)
  1. good teacher and helpful friend (idiom); mentor
Definitions (粵典–words.hk)
  1. 名詞
    一​啲​令人​可以​從​佢​身上​學​習​嘅​人​,​通常​指亦師​亦​友​嘅​朋友​。
    a helpful friend who you can learn things from, being both teachers and friends to a person
    • 一個人有良師益友真係好好,喺啲人生交叉點上,呢啲人嘅意見非常重要。
      一个人有良师益友真系好好,喺啲人生交叉点上,呢啲人嘅意见非常重要。
      It is very important to have a helpful friend who you can learn things from in your life when you are on the crossroads of life, the suggestions that they made could be very significant.
Definitions (Wiktionary)
  1. phrase, idiomatic
    good teacher and helpful friend; mentor
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    一个人有良师益友真系好好,喺啲人生交叉点上,呢啲人嘅意见非常重要。
    一個人有良師益友真係好好,喺啲人生交叉點上,呢啲人嘅意見非常重要。
    • It is very important to have a helpful friend who you can learn things from in your life when you are on the crossroads of life, the suggestions that they made could be very significant.