（5）导航系统

    不管是原厂的还是在汽配城加装的，它们都让我们省了很多事（除了有些时候它们也会莫名其妙地让我们绕弯路）。即使你知道你想去哪里，你也可以在导航上看看你大概到达的时间——然后可以努力在那个时间之内到达。

5. Navigation system

    Manufacturer-installed or aftermarket, they save lots of hassle (except for those odd times when they lead you astray). Even if you know where you're going, you can program the navi to find out what time you are expected to arrive -- and then try to beat the clock.