Note that behavior of the box's position as gravity pulls it to the ground and it comes to rest and the collision.
请注意立方体方位在重力将其拉向地面以及它静止下来和碰撞时的行为。
2
After millions of years in this position the new moon was drawn into a collision at a speed of less than three kilometres per second.
几百万年后，此状况下的新月亮以低于每秒3公里的速度要对撞了。
3
In the virtual reality interactive system of the force-feedback or touch-feedback, fast calculating exact contacted position among virtual objects is precondition of these collision detection systems.