据一位波兰妇女给我发电子邮件说，在20世纪60年代的波兰，“当局介绍了《搭便车者手册》。”
In Poland in the 1960s, according to a Polish woman who e-mailed me, "the authorities introduced the Hitchhiker's Booklet."
在一项研究中里，人们屈从于搭便车者的剥削。
In experimental settings, people were subjected to free-riders who exploited them.
不过短信可不仅仅是微小，它们还是搭便车者，硬挤进了为无线网络运营而预留的信道里面。
But text messages are not just tiny; they are also free riders, tucked into what's called a control channel, space reserved for operation of the wireless network.
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