hygienen.卫生;卫生学
Hygiene resource卫生资源
hygiene practices卫生习惯
Hygiene condition卫生状况
Hygiene situation卫生状况
hygiene equipment卫生装备
hygiene education卫生教育
hygiene of mining矿山卫生
hygiene standards卫生标准
hygiene knowledge卫生知识
Hygiene Toxicology卫生毒理学