cushion

/ˈkʊʃən/

a mechanical damper; absorbs energy of sudden impulses

中文释义：垫子；缓冲物

She placed a soft cushion on the chair for extra comfort.

她在椅子上放了一个软垫以增加舒适度。

The airbag acts as a cushion to protect passengers during a crash.

安全气囊在碰撞时起到缓冲作用，保护乘客。