free-draining

例句：

1. 1. The new drain system is designed to be free-draining.
   新的排水系统设计为无堵塞的。
2. 2.The garden hose is free-draining, so it won't clog up the drain.
   花园软管是无堵塞的，所以不会堵塞下水道。
3. 3.The rainwater harvesting system is designed to be free-draining, allowing for easy disposal of wastewater.
   雨水收集系统被设计为无堵塞的，方便废水的排放。