Sanitation includes all four of these engineering infrastructure items (even though often only the first one is strongly associated with the term "sanitation"): Excreta management systems, wastewater management systems (included here are wastewater treatment plants), solid waste management systems, drainage systems for rainwater, also called stormwater drainage.
卫生设施涵盖了以下四类工程基础设施项目（虽然通常只有第一个是与“卫生设施”一词密切相关的）：排泄物管理系统、污水管理系统（这里包括污水处理）、固体废物管理系统、雨排系统。