impact retention

• 残留冲击力

impact retention的用法和样例：

例句

1. The impact of the U-boats in the Mediterranean was heavy.
   德国潜艇在地中海的冲击力是沉重的。
2. Air bags are designed to soften the impact of a car crash.
   气囊用来减轻汽车碰撞的冲击力。