导水渠

例句：

1. 1. The farmers used to use a diversion ditch to guide the water from the stream.
   农民过去使用一条引水沟来引导河水。
2. 2. The engineer designed a new channel to improve the drainage system.
   工程师设计了一条新渠道来改善排水系统。
3. 3. The construction of this diversion ditch is crucial for flood control.
   这条引水沟的建设对于防洪至关重要。