outer waterway

例句：

1. 1. The outer waterway is lined with tall trees and lush vegetation.
   外水道两旁长满了高耸的树木和繁茂的植被。
2. 2. The outer waterway is a popular spot for fishing and boating.
   外水道是钓鱼和划船的热门地点。
3. 3. The outer waterway provides access to the mainland from the island.
   外水道为岛屿与大陆之间的通行提供了便利。