pile-down

英 ['paɪld'aʊn] 美 ['paɪld'aʊn]

• n. 反应堆的逐渐停堆

例句

用作名词 (n.)

1. But as the universe cooled down and thinned out, the collisions became less violent, and the process ground to a halt.
   但是当宇宙冷却且变得稀薄后，上述过程便逐渐停下来。