grinding ratio研磨: grind; pestle abrade; polish比: 2研磨: 1.(用工具研成粉末) grind; pestle2.(用磨料摩擦器物使变得光洁) abrade; polish研磨料；研磨物: abrasive粗砂；研磨: grit下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:研磨比，即可在微信中查询翻译
