Some European stores are testing tiny radio transmitters on their goods. The wireless devices can tell if the product is nearing its expiration date, or need to be restocked .

• 一些欧洲的商店正在测试用在商品上的极小的无线电发射器。这种无线的设备可以提示产品是否接近了保质期，说这需要重新进货储存。