grind stone

常见例句

We suggest sharpening on a wet stone because it cleans the pores of the sharpener dissipates frictional heat and facilitates smooth sharpening action.
我们建议使用一块弄湿了的磨石，因为研磨液体能帮助清洁磨具上的孔，能散去摩擦产生的热量，还能使磨刀的动作更加顺滑。
In this cavern are three massive stone wheels, each with a huge pole through its centre as an axle.
洞里有三个巨大的砂轮，每个砂轮的中心穿过一个巨大的杆作为轮的轴心。