Warning: file_put_contents(): Only 0 of 7172 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/totle.com.cn/index.php on line 55 QR code是什么意思，QR code的翻译，QR code音标、读音、用法和例句_乐豆毛深蓝词典
a pattern of black-and-white squares that is printed on something and that can be read by some types of mobile phone to give information to the user of the phone