








know by heart
be proficient in

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Open the tool →熟稔于心 (shú rěn yú xīn) means “know by heart, be proficient in”.
熟稔于心 is pronounced shú rěn yú xīn in Mandarin Chinese.
“know by heart” is 熟稔于心 (shú rěn yú xīn) in Chinese.