sewage system造句

1、The grave problem of public hygiene is connected with the inefficient sewage system of the city.
公共卫生方面的严重问题与该城低效率的污水处理系统有关。

2、ZINWA has pledged to correct the water supply and sewage system as a matter of urgency.
津巴布韦国家水管理局保证作为当务之急改善水供应和污水处理系统。

3、Those chemicals pass through the sewage system and might even end up in our drinking water.
这些化学品将穿越污水系统，并可能最终进入我们的饮用水中。