building-drainage system

例句：

1. 1. The city has a sophisticated drainage system to handle the heavy rainfall.
   这个城市有一个复杂的排水系统来处理大雨。
2. 2. The construction of the new highway will require extensive drainage work.
   新建高速公路的建设需要大量的排水工作。
3. 3. The rainwater from the roof is directed into the drainage system to be collected and treated.
   屋顶的雨水被引导到排水系统中，然后被收集和处理。