卫生学

例句：

1. 1.The importance of sanitation in maintaining public health cannot be overstated.
   公共卫生在维护公共健康方面的重要性不容忽视。
2. 2. The government has launched a campaign to promote good hygiene practices among the population.
   政府已经发起了一场运动，旨在促进民众的良好卫生习惯。
3. 3.Sanitation workers are responsible for ensuring cleanliness and sanitation in public areas.
   清洁工负责确保公共场所的清洁和卫生。