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5.environmental hygiene
环境卫生收藏指正
6.teaching hygiene
教学卫生收藏指正
7.personal hygiene;
个人卫生收藏指正
10.In order to raise the level of labor protection, China has set up many testing centers for occupational safety and hygiene and labor-safety education offices.
为了提高劳动保护水平，全国已建立许多职工安全卫生检测检验中心和劳动保护教育室；收藏指正