Which service items can they provide? These arch-competitors offer one-stop-looking of airline tickets, hotel rooms, car rental, cruises, and vocation packages.

• 他们提供哪些项目的服务呢？这两家首屈一指的竞争网站提供了上网一次，就能搞定机票，饭店，租车，游轮和度假团体预定。