短語詞組短語regular steamship service 班輪regular bus service route [公路]班車線路regular scheduled service 定期航班regular r service 定期服務(wù)a regular air service 定期航班regular air service [航]定期班機;[航]班機;定期班機regular barge service 繙譯regular emergency service 常槼應(yīng)急服務(wù)regular passenger service route 客運班線 返回 regular service