mass concentration

基本解释

The particle mass concentration rises with the increase of particle diameter.
飞灰质量浓度随着颗粒粒径的增大而增加。
The better result of refining and dewaxing was achieved by using the ethanol solution with mass concentration of 70%.
本文采用质量浓度为70%的稀乙醇进行精制除蜡，效果较佳。
The stellar orbits in the galactic centre show that the central mass concentration of four million solar masses must be a black hole, beyond any reasonable doubt.
银河系中心恒星的运行轨道表明，这个有4亿个类似太阳系的天体围绕的中心体一定是一个黑洞，这是毫无疑问的。

No one has ever forcibly moved that many people without concentration camps and mass death through plague.
FORBES: The Republican Party Needs A Reset On Immigration
In an article last month in Forbes, Reza Kahlili, a former CIA spy in the IRGC who maintains connections inside the regime, claimed that the IRGC has set up concentration camps throughout the country in anticipation of mass arrests in any future opposition campaign against the regime.
CENTERFORSECURITYPOLICY: A war on whose terms?
Most had escaped from hidden concentration camps where they suffered and witnessed routine torture, mass-execution, baby-killing, rape, human biological experiments (including the effects of anthrax) and, of course, starvation.
CENTERFORSECURITYPOLICY: Center for Security Policy

质量浓度
Visibility was negatively correlated with the number density of particles and PM2.5 mass concentration.
2.能见度与颗粒物数浓度、PM2.5质量浓度存在明显负相关性。
化学
质量浓度
Furthermore voltage, reaction temperature and amine mass concentration are important exterior factor which effect electrolysis.
此外，电压、反应温度、胺的质量浓度等均是影响反应的重要外部因素。
质量液体浓度