Since not all of these can be removed, you may dress the seat with a "valve seat dresser" by grindingdown the uneven surface.
因为并不是所有这些可以被删除，你可以打扮的“阀座修整磨削的座位下的不平衡”表面。
2
But MND is relentless in its grindingdown of both patients and those close to them, and it's a shock from which it is not easy to recover.
但是MND无情的折磨着患者的同时，也使他们身边的人痛苦不堪，尤其打击人的是它是很难康复的。
3
Researchers surmise that over billions of years the debris should collide, grinding the KBO-type objects down to ever smaller pieces that were not part of the original Kuiper Belt population.