trace substance meaning in English
痕量物质
微量物
Examples
- Air and soil quality - measurement of atmospheric deposition of organic trace substances ; funnel adsorber method - part 2 : determination of polynuclear aromatic hydrocarbons
空气和土质.有机痕量物质的大气沉积物测量.漏斗吸收 - Air and soil quality - measurement of atmospheric deposition of organic trace substances ; funnel adsorber method - part 1 : sampling devices ; requirements , installation , application
空气和土壤质量.大气有机痕量物质沉积物的测量.漏斗