collision time

例句：

1. 1.The car's collision time with the tree was very short.
   汽车与树的碰撞时间非常短。
2. 2. The impact of the new policy on the economy is still being calculated.
   新政策对经济的影响仍在计算中。
3. 3.The collision time between two objects is the amount of time they will be in contact before they separate.
   两个物体之间的碰撞时间是它们分离前接触的时间长度。