trunk canal

例句：

1. 1. The engineers are working on the construction of a new trunk canal.
   工程师们正在建设一条新的树干运河。
2. 2.The trunk canal is an important waterway for the region's agriculture.
   树干运河是该地区农业的重要水道。
3. 3.The workers carefully excavated the trunk canal to avoid damaging the surrounding environment.
   工人们小心翼翼地挖掘树干运河，以避免破坏周围的环境。