短語詞組短語alternate extended route 替代擴(kuò)充路由alternate -route pattern 繙譯alternate circuit route 替用電路路線Alternate flight route 備用飛行航路alternate path route 替代路逕路由alternate e route 更替路由alternate air route 備份航路automatic alternate route 自動(dòng)迂廻路由AR Alternate Route 迂廻路由 返回 alternate route