Some supermarkets use a special device that can "read" this code and automatically produce a receipt, and can store the information so that the shop-keeper can tell when his stock gets low.
有些超级市场使用一种特殊装置，可以“读出”这种暗码，并自动打出收据，而且可以把信息储存起来，使店主知道他的存货什么时候售完。
We went out of the room and closed the door. The shop-keeper smiled at me with his yellow teeth.
我们走出房间，关上门。店老板朝我笑了笑，露出满嘴黄牙。
We went out of the room and closed the door. The shop-keeper smiled at me with his yellow teeth.
我们走出房间，关上门。店老板朝我笑了笑，露出满嘴黄牙。
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