constant quantity

基本解釋

The article focuses on quantity analysis, discussion of using constant quantity instrument to do semimicro chemical analysis experiment.
本文圍繞定量分析實(shí)驗(yàn)中，利用常量?jī)x器進(jìn)行半微量化學(xué)分析進(jìn)行探討。
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.
采用模糊劃分（軟劃分）法，按煤層賦存等因素，給出選擇煤層回采工藝的定量方法。
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.
本文針對(duì)目前電磁理論微擾法處理中的某些不足，提出微擾量、不變量和逐級(jí)處理這三個(gè)概念。

If you have a quantity which is constant over any closed path, that quantity is a thermodynamics state function.
如果有一個(gè)物理量,對(duì)任何閉合回路積分是常數(shù)，這個(gè)物理量就是一個(gè)熱力學(xué)態(tài)函數(shù)。
麻省理工公開課 - 熱力學(xué)與動(dòng)力學(xué)課程節(jié)選
Then we can take the derivative of that quantity, when we vary the temperature, holding the volume constant.
即恒定體積，改變溫度，這里恒定溫度下。
麻省理工公開課 - 熱力學(xué)與動(dòng)力學(xué)課程節(jié)選
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?yàn)槲覀冃枰牧?是由這個(gè)量乘以一個(gè)常數(shù)，因?yàn)檫@個(gè)量是零，因此我們需要的量也是零。
麻省理工公開課 - 熱力學(xué)與動(dòng)力學(xué)課程節(jié)選

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