见我上一帖。你根本没读懂第一句话。
【 在 qtpr 的大作中提到: 】
: The base quantities of a given system of physical quantities is a subset of those quantities, where no base quantity can be expressed in terms of the others, but where every quantity in the system can be expressed in terms of the base quantities.
:
: ”The base quantities of a given system of physical quantities“这是什么意思还不明白吗？呵呵
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FROM 221.237.33.*