tea: #QR Code#QR Codes: Explained ——纽约大学 http://n.ocjg.com/oji/index.php?mod=url&code=ai
QR codes, or Quick-Response codes, are easily readable barcodes that when scanned
with a QR decoder (usually available on smartphones) can translate the code into a URL, a telephone number, a bit of text, or other data.