principal path

例句：

1. 1.The main path leads to the nearest town.
   主要路径通向最近的城镇。
2. 2. The principal path is usually less crowded than the side roads.
   主干道通常比旁边的小路车少。
3. 3.The main path was closed for repairs.
   主干道因维修而关闭。