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Jyutping si3 gam1 sek6
Pinyin shì jīn shí

Definitions (CC-CEDICT)
  1. touchstone
  2. fig. test that sth is genuine
Definitions (粵典–words.hk)
  1. 名詞
    一​嚿​用​嚟​試​驗​金​屬​成色​同純​度​嘅​黑色​礦石​,​引申​指​可靠​嘅​檢​驗​方法
    touchstone (both literally and figuratively)
    • 呢場賽事有唔少靚馬參賽,係馬匹實力嘅試金石。
      呢场赛事有唔少靓马参赛,系马匹实力嘅试金石。
      ni1 coeng4 coi3 si6 jau5 m4 siu2 leng3 maa5 caam1 coi3, hai6 maa5 pat1 sat6 lik6 ge3 si3 gam1 sek6.
      Competing in this race are some good horses. It is a touchstone for their strength.
Definitions (Wiktionary)
  1. noun, idiomatic
    an acid test
    • 這種事情是夫妻感情好壞的分水嶺,試金石!
      这种事情是夫妻感情好坏的分水岭,试金石!
      zhè zhǒng shì qíng shì fū qī gǎn qíng hǎo huài de fēn shuǐ lǐng , shì jīn shí !
      This (a couple's sex life) is the kind of thing that is a critical indicator, an acid test, of how a husband and wife feel about each other!
  2. noun
    a touchstone
Examples (粵典–words.hk)
  1. Cantonese
    呢场赛事有唔少靓马参赛,系马匹实力嘅试金石。
    呢場賽事有唔少靚馬參賽,係馬匹實力嘅試金石。
    ni1 coeng4 coi3 si6 jau5 m4 siu2 leng3 maa5 caam1 coi3, hai6 maa5 pat1 sat6 lik6 ge3 si3 gam1 sek6.
    • Competing in this race are some good horses. It is a touchstone for their strength.
Examples (Wiktionary)
  1. Mandarin
    这种事情是夫妻感情好坏的分水岭,试金石!
    這種事情是夫妻感情好壞的分水嶺,試金石!
    zhè zhǒng shì qíng shì fū qī gǎn qíng hǎo huài de fēn shuǐ lǐng , shì jīn shí !
    • This (a couple's sex life) is the kind of thing that is a critical indicator, an acid test, of how a husband and wife feel about each other!