Walmart, like most major retailers, is replacing the labels on its shelves with small electronic screens, so it can change prices and offer promotions quickly and cheaply.
与其他多数大型零售商一样,沃尔玛(Walmart)正将货架上的价签换成小电子屏幕,这样就能低成本并且快速地更改价格和进行促销。
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