“二维码”和“扫码关注”可能现在大家天天都会听到，尤其是走在大街上会有推广某种产品的人说“扫码关注，免费送耳机”等。如果想真正学好英语，凡是我们经常听到的，说到的，看到的，想到的，都值得思考如何用准确的英语表达出来。今天我们就来看一下“二维码”和“扫码关注”对应的英语。
二维码是二维条码(也叫二维条形码)的简称，英文是two-dimensional barcode。微信上用的二维码叫QR code，属二维条码的一种，它是Quick Response Code的缩写，意思为“快速响应码”。
dimensional这个词相信大家不会陌生，我们经常说的3-D(电影)，就是three-dimensional的缩写。
此外，barcode也可写作bar code，意思为“条码”，也叫“条形码”，和二维码不同，它是一维的。bar是“(长)条”的意思，如“长铁条”是a long iron bar，“一条巧克力”是a bar of chocolate。
“扫码关注”是scan a QR code to follow。例如，“请扫以下二维码关注我们以获取更多资讯”就是For further information, please scan the QR code below to follow us。
总结一下：
QR code (微信的)二维码
scan a QR code to follow 扫码关注
以下内容供大家参考：
QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional barcode) first designed for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte/binary, and kanji) to efficiently store data; extensions may also be used.
(来源：维基百科，地址为https://en.wikipedia.org/wiki/QR_code)
【例】A three-dimensional picture, image, or film looks as though it is deep or solid rather than flat. The abbreviation 3-D can also be used.
(来源：Collins COBUILD Advanced Learner's Dictionary 5th Edition)
【例】A bar code is an arrangement of numbers and parallel lines that is printed on products to be sold in shops. The bar code can be read by computers.
(来源：Collins COBUILD Advanced Learner's Dictionary 5th Edition)
【例】Walkers in Newport can now scan eight QR codes across the city centre as part of the 'Heroes and Villains' tour.
(来源：BBC官网，地址为http://www.bbc.com/news/uk-wales-south-east-wales-32380294)
【例】Furthermore, about 75% said they were unlikely to scan a QR code in the future.
(来源：CNN官网，地址为http://edition.cnn.com/2011/12/08/tech/mobile/qr-codes-gahran/index.html)
