"Before cars had GPS systems, he'd use it so he wouldn't have to ask for directions," says his wife, Linda, a teacher.

他的妻子琳达(琳达是个教师)常说：“以前车上还没有GPS系统时，他就常用这东西找路，以免麻烦去问人家。”

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Volvo's engineers envision cars being able to warn each other of hazards such as slippery roads. Some GPS units already tip each other off about traffic jams.

沃尔沃的工程师们预计，车辆将可以彼此警告如湿滑路面等危险情况，一些汽车导航仪甚至已经可以相互警告交通堵塞了。

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With some imagination, the coordinates generated could be the positions of nearby public transport, marathon runners carrying GPS devices, cars in a rally, or the location of a package in transit.

发挥一下想象力，生成的坐标值可能就是临近的一个公共车站、随身携带着GPS设备的马拉松选手、汽车拉力赛中的汽车或者运输中的包裹。

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Those surveyed also reported a 40 percent increase in thefts, including those of GPS devices from cars and other "opportunistic" crimes.

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Such online research has evolved beyond predicting whether green sneakers will prevail over purple ones--or if customers prefer seat warmers to GPS devices in cars.

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According to the scientists, the margin of error of commercial GPS used in cars is about 15m in an open field, where the receiver has good visibility from the satellites.

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