而且对于旅客来说最有用的服务应该是全球定位系统跟踪服务(GPS tracking)，如果需要的话它是实时运行的，这样用户就不需要每次使用时，都要重新启动一个应用程序或功能条。
And arguably the most useful service for the traveller, GPS tracking, will run constantly (if required) so users do not need to restart an app or piece of functionality each time they fire it up.
GPS全球定位系统以其全球性、全天候、实时定位等优点显示出强大的生命力和竞争力，在航空、航天、航海及许多民用领域有着广泛的应用。
Global Positioning System(GPS)is a satellite navigation system designed to provide instantaneous three-dimensional position infbrmation almost anywhere on the globe at any time, and in any weather .
本文介绍了目前精度最高的全球定位系统(GPS)，并将之应用于功角实时测量系统。
This paper introduces Gloabal Position system (GPS), which has the highest precision, and applies it to real-time power Angle measuring system.
应用推荐