通常这将是在地理上相邻或能够送达，也就是说，在空中航线。

Normally these would be geographically adjacent or able to be served, say, on an air route.

youdao

通常这将是在地理上相邻或能够送达，也就是说，在空中航线。

Normally these would be geographically adjacent or able to be served, say, on an air route.

youdao