You take a pendulum in the shuttle and you put it at this Angle, you let it go, it will stay there forever and ever and ever.
在飞船里拿一个钟摆，举到这个角度，释放它，它会呆在那里，永远。
2
When we rotate this side here, but the Angle doesn't stay at a right Angle.
当旋转这个边时，这个角就不再是直角了。
3
The trajectory of vehicle barrier crash should be able to stay in the smooth transition, does not affect the normal running of the vehicle to leave the springback Angle and the smaller the.