| 释义 |
quality concentration
基本例句
质量浓度
The difference between par-ticle mass concentration and Bosch smoke number is indicated.指出微粒的质量浓度与波许烟度的不同。
The alkalescent condition reduces the mass concentration of iron ions and fastens the nitration reaction of ammonia nitrogen, and leads to the concentration of nitrate.偏碱性条件使铁离子质量浓度降低，同时促进了氨氮硝化反应进行，使矿井水中硝酸盐和亚硝酸盐质量浓度增加。 |