permanent deflection

• 永久变位,永久压凹

permanent deflection的用法和样例：

例句

1. A disturbance traveling through a medium by which energy is transferred from one particle of the medium to another without causing any permanent displacement of the medium itself.
   波，振动穿过介质的振动，通过振动使能量从介质的一个粒子传送到另一个粒子而并不导致介质本身的永久变位。