physical constant

Slightly belying its name, the fine-structure constant is actually a compound of several other physical constants, whose values can found in any physics textbook.

精细结构常数实际上是其他几个能在任何物理学教科书中找到数值的物理常数合成，同它的名称稍微有些名不副实。

And it says that the divergence of the electric field is equal to, so this is a just a physical constant, and what it is equal to depends on what units you are using.

它说的是，电场的散度等于，这是一个物理常数，它等于什么，是基于所用的单位。

This paper analyses the physical constant constructing by dimensional method and introduces the important mean of dimension of quantity in physical constant constructing.

采用量纲的方法分析物理常数的构造，讨论了物理量的量纲在物理常数构造中的重要意义。