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Jyutping cat1 sing4 suk6
Pinyin qī chéng shú

Definitions (Wiktionary)
  1. adj, of cooking
    medium well
    (syn.) 七分熟

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Jyutping cat1 sing4 suk6
Pinyin qī chéng2shu

Definitions (CC-CANTO)
  1. medium-well done (steak) [written and colloquial]
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    五成熟牛排见了七成熟牛排为什么不打招呼?两个都不熟。
    五成熟牛排見了七成熟牛排為什麼不打招呼?兩個都不熟。
    wǔ chéng shú niú pái jiàn le qī chéng shú niú pái wèi shén me bù dǎ zhāo hu ? liǎng gè dōu bù shú 。
    • Why didn't the half-cooked steak say hello to the nearly-cooked steak when the two saw each other? They both weren't ready.