摘要
如果你正尽地主之谊，带朋友到家中一访，你会为他们引路。一间大红屋，一个公交站牌，或是私人通道前的一处凹坑——这些地标你并不陌生。但是，假如一切如故，而你正游在大西洋中央，又是怎样一番境遇呢？你还能找到回家的路吗？
If you were bringing friends home to visit, you could show them the way. You know the landmarks--a big red house, a bus-stop sign, or even a ： in front of your driveway. But what if you were swimming in the middle of the Atlantic Ocean, where everything looks almost the same？ Could you find your way home？
