你有没有在网站上看到过那些奇怪的方块条形码，不知道他们是用来干什么的？
Have you ever seen those odd looking square barcodes on a website and wondered what the heck they where for?
每一次你都会听到一些听上去伟大的产品却有一个奇怪的限制，想知道为什么就从钱上找原因吧。
Every time you hear about some product that sounds great but just has one strange limitation, follow the money to understand why.
要的东西真奇怪，监狱中没什么会把你弄脏，天知道。
Funny thing to want, for there isn't much to get you dirty in jail, goodness knows.
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