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现在“二维码”这个词很火。看电视时,屏幕的一角会出现个二维码,街边广告牌的一角也会赫然印着一个二维码,车票、机票上也开始印着二维码。“二维码”到底是个啥东西呢?
Now the word “QR code” is very hot. When watching TV, a two-dimensional code appears in the corner of the screen. A corner of the street billboard will be impressively printed with a two-dimensional code. Tickets also start to be printed on the ticket. “Two-dimensional code ” in the end is what thing?