上周，Guba降价，使新旧电影分别以9.99和4.99美元的价格进行下载，销售量随即增长十倍。
When Guba cut its prices last week, allowing new films to be downloaded for $9.99 and older ones for $4.99, its sales jumped tenfold.
现在的科学技术使人们能够依据最近的需求模式和存货水平快速升降价格。
Today's technologies allow us to change prices rapidly based on the most recent demand patterns and stock levels.
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