GPS-navigating GPS导航
GPS is accurate to within about 15 feet (five metres); fine for navigating a car but too imprecise for pedestrians.
GPS的精度为15英尺(相当于5米)；这对于汽车导航来说是足够了，但是对于定位行人来说就太不精确了。
GPS was satellite navigating and positing system, which was researched and used in the USA, about 10 years ago. Its application has been spreaded over the international economy.
GPS全球定位系统是美国研制并在10年前投入使用的卫星导航与定位系统，其应用技术已遍及国民经济的各个领域。
Very few people are in the habit of asking themselves each morning "What will I measure today? " That's a missed opportunity, like failing to look at the compass or GPS while navigating a vehicle.
很少有人会习惯于每天早晨都问自己一遍“今天我要衡量什么”，其实他们错过了一个机会，就像开车没有看指南针或GPS导航一样。
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