安全气囊,也称辅助乘员保护系统,是一种当汽车遭到碰撞而急剧减速时能很快膨胀的缓冲气囊,是一种被动安全装置,它可以保护车内乘员不致撞到车厢内部。 Airbag, also known as a supplemental occupant protection system, is a type of cushioning airbag that expands rapidly when a car crashes with a sharp deceleration. It is a passive safety device that protects occupants of a vehicle from bumping into the interior of a car.