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.

对任何类型的阀门都不是很了解，但知道阀门是折门，从这个缝隙中突然射出道光，第次生动地想结构中的精密调整机制让大吃惊。