In one word speed. _(3)_ taking out a card, passing it through the reader, and waiting for it to come out, all it takes is one quick swipe across the sensor at the turnstile.

• 不像以前那样需要把卡拿出来，放入卡片阅读机验完票再取票，现在你只要在入口处将悠游卡放在感应器上很快刷一下即可。