Typhoid fever sneaks in when sanitation fails.
环境卫
搞不好,伤寒就会乘虚而入。
系统或设备
词
词的，清洁的;学;的，保健的;Typhoid fever sneaks in when sanitation fails.
环境卫搞不好,伤寒就会乘虚而入。
A sanitation worker picking up cigarette butts with an "in-dividually decorated bag" in his hand in Zhongguancun, March 9, 2009.
3月9日，中关村过街天桥,保洁员的手提袋上贴满了从墙上撕下的小
。
The content of lead in the tealeaf is one of important guild line scaling the status of the tealeaf's sanitation by it.
叶中铅的含量是衡量叶卫状况的重要指标之一。
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