Where the naught refers now to the standardconcentration.
作比较,零表示标准浓度。
2
The intensity or concentration of the occupational-disease-inductive substances does not meet the national standard of occupational health;
工作场所职业病危害因素的强度或者浓度超过国家职业卫生标准的;
3
The average concentration of particulates in city air during 2008, for example, was six times the ideal standard recommended by the World Health Organization.