求翻译：由于车辆的来来往往太复杂，公交语音播报一般采用GPS卫星导航系统，以便于能够更加保证不分散司机的注意力[4]。在小城市，人口流动量小，车辆也不是很多，考虑到成本问题，公交语音播报系统会选择较为廉价的人工按键来实现。是什么意思？

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As a result of the passing vehicles too complex and public transport voice broadcast generally use the GPS satellite navigation system in order to be able to more guarantees of non-distributed drivers' attention [4]. In smaller urban population movements, a small amount of the vehicles not many, tak

Because the vehicles come and go too complex, the public transportation pronunciation disseminates news uses the GPS satellite navigational system generally, is advantageous for can even more guarantee not the dispersible driver's attention( 4).In the small city, the population flow is small, the ve

Because the vehicles coming and going of complex, voice broadcast usually uses the GPS satellite navigation system for public transportation, in order to be able to further ensure does not distract the driver's attention [4]. In a small town, small amount of population movements, is not a lot of veh

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