Of course sheet scanning speed may vary depending on the scanning equipment, if with high-speed scanning speed, that just like the speed of paper money, everyone knows that how fast.

当然答题卡扫描速度的快慢取决于所用的扫描设备了，如果用高速扫描仪扫描的速度，那就像点钞机过钞票的速度一样，大家都知道那有多快。

youdao

LONDON, England (CNN) -- A system using fingerprint scanning and face recognition systems, designed to speed up passenger transit times and increase security, is beginning a trial at Heathrow airport's Terminal 3.

CNN: Heathrow tests biometrics