constant quantity

基本解释

The article focuses on quantity analysis, discussion of using constant quantity instrument to do semimicro chemical analysis experiment.
本文围绕定量分析实验中，利用常量仪器进行半微量化学分析进行探讨。
In this paper, we put forward a constant quantity method of selecting coal layer with fuzzy classification by means of coal deposit factors and so on.
采用模糊划分（软划分）法，按煤层赋存等因素，给出选择煤层回采工艺的定量方法。
According to some disadvantages in the disposal process of the perturbation method, the concepts of perturbation quantity, constant quantity and stepwise disposal have been introduced.
本文针对目前电磁理论微扰法处理中的某些不足，提出微扰量、不变量和逐级处理这三个概念。

If you have a quantity which is constant over any closed path, that quantity is a thermodynamics state function.
如果有一个物理量,对任何闭合回路积分是常数，这个物理量就是一个热力学态函数。
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Then we can take the derivative of that quantity, when we vary the temperature, holding the volume constant.
即恒定体积，改变温度，这里恒定温度下。
麻省理工公开课 - 热力学与动力学课程节选
And that implies that since the quantity we want is given by this quantity, which is zero times a constant, the quantity we want is also zero.
因为我们需要的量,是由这个量乘以一个常数，因为这个量是零，因此我们需要的量也是零。
麻省理工公开课 - 热力学与动力学课程节选

With work dominating our lives in so many ways and with the constant expectations to produce a quantity of quality results, it only makes sense that we should be having fun along the way.
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