tributary ditch

例句：

1. 1.The river flows through the town,creating a series of tributaryditches.
   这条河流经城镇，形成了一系列的分水渠。
2. 2. Theengineer designed the tributary ditch to divertthe water from the main stream.
   工程师设计了分水渠，将水流从主河道引走。
3. 3. The tributary ditch is essential for maintaining theecological balance of the area.
   分水渠对于维护该地区的生态平衡至关重要。