He makes his own paint, grinding up the pigment with a little oil.

他把色料块加少许油磨碎，自己制成绘画颜料。

《柯林斯英汉双解大词典》

If you often wake up with a dull headache or sore jaw, you may be grinding your teeth or clenching your jaw while you sleep, a problem called bruxism.

如果你经常醒来的时候有轻微的头痛或下巴肿痛，你可能是在睡觉的时候磨牙或者紧闭牙关，被称为夜间磨牙症。

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They also lost the grinding molars that brown bears use to chew up plant matter.

它们也失去了棕熊用来咀嚼植物性食物所用的臼齿。

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Grinding up trees,houses,boulders, locomotives,humans, and animals in its path, it slammed into Johnstown, pulverizing the center of town.

VOA: standard.2010.04.26

Elvis continued to have success in the 1970s, but his abusive drug habit and a grinding tour schedule soon caught up with him.

VOA: standard.2010.04.30

But those most inconvenienced were aboard a train that left New York early Friday morning ended up grinding to a halt at 11 p.m. that night in Prince, West Virginia, after trees blocked tracks both in front of and behind it, Amtrak spokesman Steve Kulm said.

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This raises the question of how he could know what he seems to know, since the 18-year-old has grown up in grinding poverty.

WSJ: 'Slumdog' Finds Riches in Poor Boy's Tale

To underscore the point, after the demo the pair showed a video of a blender grinding up a Glass.

FORBES: Google Reveals How To Hack Google Glass Device (And Void Your Warranty)