car impact的用法和樣例：
例句
- Air bags are designed to soften the impact of a car crash.
氣囊用來(lái)減輕汽車(chē)碰撞的沖擊力。 - Joint failure modeling in car crashsimulation is described in this paper.Diffe rent constrains and failure criteria of different joint models are discussed.
描述了汽車(chē)碰撞仿真研究中連接方式的模擬方法，討論了各種連接方式的不同約束條件和失效準則。
