n. 排水,放水;排水系统;排走物,废水;排水区域
网络 下水道; 引流; 排水设备
The area has good natural drainage.
这个地区有良好的天然排水系统。
The bricks were bedded in sand to improve drainage.
沙里埋入砖块,以改进排水系统。
Hundreds of miles of drainage canals were built in the wetlands.
湿地上修建了数百英里的排水沟渠。
The city planner decided to build an underground drainage system.
城市规划师决定建一个地下排水系统。
If no drainage system exists, the water table rises, bringing dissolved salts to the surface.
如果没有排水系统,地下水位就会上升,把溶解的盐带到地表。