只要功夫深，鐵杵磨成針

zhǐyàogōngfūshēn,tiěchǔmóchéngzhēn

if you work at it hard enough, you can grind an iron rod into a needle—perseverance spells success

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zhi3 yao4 gong1 fu5 shen1 , tie3 chu3 mo2 cheng2 zhen1

If you work at it hard enough, you can grind an iron bar into a needle., cf idiom 磨杵成針, 磨杵成针, to grind an iron bar down to a fine needle (idiom); fig. to persevere in a difficult task, to study diligently

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只要功夫深，鐵杵磨成針|只要功夫深，铁杵磨成针 [zhǐ yào gōng fu shēn , tiě chǔ mó chéng zhēn] ► If you work at it hard enough, you can grind an iron bar into a needle. ► cf idiom ↑磨杵成針|↑磨杵成针, to grind an iron bar down to a fine needle (idiom); fig. to persevere in a difficult task ► to study diligently