磨ㄇㄛˊmó杵ㄔㄨˇchǔ成ㄔㄥˊchéng針ㄓㄣzhēn

  1. 比喻只要有恆心，努力去做，無論多麼困難的事，都可以成功。參見「鐵杵磨成針」條。

英to grind an iron bar down to a fine needle (idiom)​; fig. to persevere in a difficult task, to study diligently