Proportional constant of physics is a common constant of physical theorem and physical law.

物理比例常数，是物理定理、物理定律公式中一个最常见的常数。

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The computer PID control for electro hydraulic proportional constant presure variable displacement pump with electric feedback is introduced.

介绍了电反馈电液比例恒压变量泵的计算机PID控制。

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So, to say that the rate at which area is swept is constant means that these two are proportional.

所以定律说，扫过的面积是常量，意思是这两个是成比例的。

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What Einstein then clarified for us was that we could also be talking about energies, and he described the relationship between frequency and energy that they're proportional, if you want to know the energy, you just multiply the frequency by Planck's constant.

爱因斯坦阐述的是我们,也可以从能量的角度来谈论，他描述频率和能量之间的关系,是成比例的，如果希望知道能量值，你用普朗克常数乘以频率就可以了。

麻省理工公开课 - 化学原理课程节选

By the autumn, faced with Scottish parliament elections, using yet another proportional system, voters could be both bewildered and fed up with constant electioneering.

ECONOMIST: Devolution