grindstone

名词 grindstone:

1. a revolving stone shaped like a disk; used to grind or sharpen or polish edge tools

1. The teacher believed in hard work and always keep our nose to the grindstone.
   老师提倡勤奋，而且也总是要我们埋头读书。
2. I always admire men, even the dullest, who know their job and put their noses to the grindstone.
   我一向敬重那些有专长且做事勤奋不懈的人，包括那些最没情趣的人。
3. Our factory produces grindstone.
   我们工厂生产磨刀石。
4. They ground the knife on a grindstone.
   他们在磨刀石上磨刀子。

grind.stone

n.（名词）
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

<习惯用语>put (one`s) nose to the grindstone【非正式用语】
To work in earnest.
认真地工作