他们的建议很简单：在出发之前，你一定要预先知道怎样走——而更好的办法，就是使用全球位置测定系统作导航。
Their advice is simple: before you go anywhere, make sure you have the right directions—or, better yet, a global positioning system (GPS) for navigating.
探险队在那个地点做了记号，读取了全球定位系统测定的那个地点所在位置，并于去年8月返回该地点挖掘遗骸。
The team marked the site, took a GPS reading of the location, and returned last August to excavate the remains.
探险队在那个地点做了记号，读取了全球定位系统测定的那个地点所在位置，并于去年8月返回该地点挖掘遗骸。
The team marked the site, took a GPS reading of the location, and returned last August to excavate the remains.
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