只ㄓˇ要ㄧㄠˋzhǐyào功ㄍㄨㄥ夫ㄈㄨgōngfū深ㄕㄣshēn，鐵ㄊㄧㄝˇ杵ㄔㄨˇtiěchǔ磨ㄇㄛˊ成ㄔㄥˊmóchéng針ㄓㄣzhēn

简只要功夫深，铁杵磨成针

zhǐyào gōngfu shēn, tiěchǔ móchéng zhēnㄓˇ ㄧㄠˋ ㄍㄨㄥ　˙ㄈㄨ　ㄕㄣ，ㄊㄧㄝˇ ㄔㄨˇ ㄇㄛˊ ㄔㄥˊ ㄓㄣ

〈諺〉只要花費的時間、心力夠多，就連鐵杵也能磨成細針。比喻只要肯下苦功並持之以恆，再難的事情也能辦成。例「要精通學問或技藝沒有捷徑，只要功夫深，鐵杵磨成針」。

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