研究不同撞击速度下，红细胞损伤情况。
To research the hurt status of red blood cell in different impacting speed.
假如小行星撞击地球，它们的平均撞击速度将达到30公里每秒。
If an asteroid hit Earth, it's average speed would be 30kilometers per second.
所以在撞击的过程中,平均加速度,只有。
So therefore the average acceleration during the impact 5/ divided by one quarter...
碎片撞击这种卫星时，动能削弱、其速度也因每次撞击而慢下来。
Debris hitting such a satellite would give up momentum-and thus velocity-with each collision.
这可能是由于洞穴，速度撞击，甚至一般的磨损。
This can be caused by potholes, speed bumps, and even general wear and tear.
这可能是由于洞穴，速度撞击，甚至一般的磨损。
This can be caused by potholes, speed bumps, and even general wear and tear.
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