铁杵磨成针 Strokes fell great oaks,
Grinding It Out,perseverance will prevail
只要功夫深铁杵磨成针 if you work hard enough, you can grind an iron rod into a needle
铁杵磨成针 Strokes fell great oaks,
Grinding It Out,perseverance will prevail
只要功夫深铁杵磨成针 if you work hard enough, you can grind an iron rod into a needle