basic route

例句：

1. 1. The basic route to the city is through the main highway.
   通往城市的主干道是经过这条高速公路。
2. 2. The company's main route for distribution is through its own warehouses.
   该公司的主要配送路线是通过自己的仓库。
3. 3. The basic route to the summit was via a steep trail.
   前往山顶的基本路线是通过一条陡峭的小路。