下水道的水在卫生处理惩罚厂担当最初的清理，清除固体废料，添加有益的细菌解析处理惩罚过的人类废料。

Sewer water undergoes initial cleansing at a sanitation plant to remove solid waste and add beneficial bacteria that break down sludge.

youdao

下水道的水在卫生处理惩罚厂担当最初的清理，清除固体废料，添加有益的细菌解析处理惩罚过的人类废料。

Sewer water undergoes initial cleansing at a sanitation plant to remove solid waste and add beneficial bacteria that break down sludge.

youdao