self-propelled crash test

例句：

1. 1. The self-propelled vehicle was designed to be more environmentally friendly.
   这款自推进式车辆的设计旨在更加环保。
2. 2.The automotive company conducted a series of vehicle crash tests to ensure safety standards were met.
   这家汽车公司进行了一系列的车辆碰撞测试，以确保安全标准得到满足。
3. 3. The vehicle crash test results showed that the new model had improved safety features compared to its predecessor.
   车辆碰撞测试结果显示，新款模型相较于前代车型在安全性方面有所提升。