沟渠

例句：

1. 1. The farmer dug a ditch to divert the rainwater from the field.
   农民挖了一条沟渠，将雨水从田地引走。
2. 2. The river flows through several meandering channels, providing water for the town.
   这条河流穿过几个蜿蜒的河道，为城镇提供水源。
3. 3. The engineer designed a series of channels to improve the drainage system.
   工程师设计了一系列渠道来改善排水系统。