n.公共卫生；卫生设备；下水道设施

Sanitation is necessary to prevent this. 要防止病从口人就必需讲究卫生。

They live in conditions of appalling sanitation. 他们在十分恶劣的卫生条件下生活。

Studies show that the disease has been cut by 77 percent in some areas through providing better water and sanitation. 研究表明，通过提供更好的水和卫生设备，有些地区的发病率减少了77%25。

The Romans, for instance, constructed aqueducts to bring fresh water to their towns and sewers to provide sanitation. 例如罗马城通过构筑沟渠引清水洗刷城镇，建造下水道提供卫生设施。