water efficiency of canal

例句：

1. 1. The canal is the maintransportation route for goods in this region.
   这条运河是该地区的主要货物运输路线。
2. 2. The constructionof the canal has greatly improved thelocal economy.
   这条运河的建设极大地促进了当地经济的发展。
3. 3. The canal connects two cities, providing easy access to their respective ports.
   这条运河将两个城市连接起来，方便了它们各自的港口之间的交通。