| 释义 | 
		grind·stone AHD[grīndʹstōn'] D.J.[ˈgraɪndˌstəʊn]K.K.[ˈgraɪndˌston]n.(名词)  grindstone- A revolving stone disk used for grinding, polishing, or sharpening tools.砂轮:用来打磨、打光或磨利工具的旋转石盘
 
 - A millstone.磨石
 
  put (one's) nose to the grindstone【非正式用语】  - To work in earnest.认真地工作
 
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