He was not much acquainted with valves of any sort, but he knew that valvae were folding-doors, and through this crevice came a sudden light startling him with his first vivid notion of finely adjusted mechanism in the human frame.

他对任何类型的阀门都不是很了解，但他知道阀门是折叠门，从这个缝隙中突然射出一道光，他第一次生动地想到人体结构中的精密调整机制让他大吃一惊。