We all know that slacking off on dental hygiene is the first way to get cavities, but stress can also be a culprit, say experts, especially when you’re grinding your teeth at night or during the day.

我们都知道对牙齿保健的懈怠是诱发龋齿的第一因素，但专家称压力也可能导致龋齿，尤其是当你晚上或白天磨牙时。

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I like to think of the tree itself: — first the close dry sensation of being wood; then the grinding of the storm; then the slow, delicious ooze of SAP.

我喜欢想像那棵树本身的情景：首先是它自身木质的细密干燥的感觉，然后想像它感受到雷雨的摧残；接下去就感到树液缓慢地、舒畅地一滴滴流出来。

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my first Saturday job was as a butcher's boy, sanding down the blocks, cleaning the walls and grinding the mince.

因为我的第一份业余工作就是给一个屠夫打下手，沙下肉块，清理墙壁，研磨肉糜。

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And the first year of law school was notorious for being difficult and grinding, you know, it was like that.

法学院的第一年是众所周知的——课程很难，让人难以忍受。

哥伦比亚的氛围 - SpeakingMax英语口语达人

Safin, a two-time Grand Slam winner, lost that first set but returned refreshed, gradually grinding his Spanish opponent into submission.

BBC: Safin books meeting with Federer

In the latter case, the kernels are soaked in lye first (making hominy) then dried before grinding.

NPR: Kernels of Truth About Cornmeal

The first time Bernie Madoff called me, the grinding sounds of a floor buffer in the background nearly drowned him out.

NEWYORKER: Madoff��s Curveball