磨穿铁砚[mó chuān tiě yàn]
词典grind [wear] through an inkstone [iron inkslab] -- long years of ardent study
词典grind away at one's studies：磨穿铁砚；悬梁刺股。
词典study diligently and unremittingly：磨穿铁砚。
磨穿铁砚[mó chuān tiě yàn]
grind [wear] through an inkstone [iron inkslab] -- long years of ardent study; grind away at one's studies; study diligently and unremittingly
1. Work hard for a long time：马到成功 Make it upon arrival. | 磨穿铁砚 Work hard for a long time. | 难得湖涂 It's nice to feign muddle-headed.