Most shield erosion occurs on the posterior side abutting the retro-boosters.

绝大多数被腐蚀的防护罩都是在后端，紧靠倒助推器的部分。

It's definitely abutting the aorta and the left kidney.

毗邻腹主动脉和左肾。

It was not, in appearance, so desirable a habitation as his old quarters: being a mean and badly-furnished apartment, of very limited size; lighted only by one small window in the shelving roof, and abutting on a close and dirty lane.

从表面上看，这里不像他以前的住所那样令人向往：这是一间简陋、陈设简陋的公寓，面积非常有限；只有搁架屋顶上的一扇小窗户采光，紧靠一条又近又脏的小巷。