A keyboard generates two scancodes when the user types a key-one when the user presses the key and another when the user releases the key.
当用户按键时候会产生两个扫描码——一个是按下的时候产生的,另外一个是当用户手释放的时候产生的。
2
Smartphones also typically feature cameras with a macro mode that allows automatic focus over very short distances to scancodes that appear in a newspaper or magazine.
智能手机还带有具有微距模式的摄像头,这些摄像头可以短距离自动对焦扫描出现在报纸和杂志上的条码。
3
While you can use it to scan typical barcodes and look up pricing on items, the greatest feature is using it for scanning QR Codes.