Now, this is also 1 over m total times the total momentum, because I've all these momenta of these individual particles.
这是质量总和,乘以总动量，因为我得到这些动量,单个粒子的动量。
Now, this is also 1 over m total times the total momentum, because I've all these momenta of these individual particles.
这是质量总和,乘以总动量，因为我得到这些动量,单个粒子的动量。
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