经过一段时间后，对看来是同样的一件商品进行重新扫描，产生的激光散斑样式应该相同。
When what purports to be the same item is re-scanned at some later date, it should show the same pattern of speckle.
另外的一件商品杨小姐同样发现价格比实际的39元超过40元。
The other item Ms. Yang bought also turned out to be nearly 40 yuan more expensive than its price of 39 yuan.
另外的一件商品杨小姐同样发现价格比实际的39元超过40元。
The other item Ms. Yang bought also turned out to be nearly 40 yuan more expensive than its price of 39 yuan.
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