磁性物质质量分数
mass fraction of magnetic substances
能量物质化
materialization of energy
小相对分子质量物质
Small relative molecular mass compounds
沉积物质量标准
Sediments quality standards
沉积物质量基准
Sediment quality criteria
sediments quality criteria
sediment quality guidelines
大气颗粒物质量浓度
Atmospheric particle mass concentration
氮氧化物化学发光光谱
oxynitride chemiluminescence spectrum