Dad has the habit of grinding his teeth in his sleep.

老爸有睡觉时磨牙的习惯。

Here we are with my ceramic spice grinder, and into it we'll pour our peppercorns and set about grinding them in much the same way cookie monster eats cookies.

这是我的陶瓷香料研磨机，我们将把花椒倒入其中， 然后开始研磨它们， 就像饼干怪物吃饼干一样。

A few hours later, I was but a walking disease; my mind — if one could use the word — had become a barrel-organ, grinding in endless repetition a bar or two of idle music.

几个小时后，我就成了走路的病；我的头脑——如果可以用这个词的话——变成了一个管风琴，无休止地重复着一两小节的闲乐。