通用产品代码符号，亦称“条形码”，印在出售的商品上，其中含有计算机能识别的信息。
The Universal Product Code symbol, also known as the 'bar code', is printed on products for sale and contains information that a computer can read.
图尔说，一旦研究成功，超市里的每件商品将都能拥有自己专属的识别代码，还能透露该商品上架多长时间等信息。
That would be enough to give a unique identification code to each item in a supermarket, along with information like how long the item has been on the shelf, Tour says.
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