任何新航空公司一旦在事先确定的时期内运行一条航线，都将获得相关航线的终身运营权。

Any new entrant will obtain grandfathering rights over the relevant slots once it has operated a route for a predetermined period.

youdao

任何新航空公司一旦在事先确定的时期内运行一条航线，都将获得相关航线的终身运营权。

Any new entrant will obtain grandfathering rights over the relevant slots once it has operated a route for a predetermined period.

youdao