我不确定虫类会很快成为一种受欢迎的零食。

I'm not sure bugs will become a popular snack anytime soon.

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但在某些情况下，某市场营销者的自有媒介会成为另一个营销者的付费媒介。比如，当某电子商务零售商出售其网站上的广告空间时。

But in some cases, one marketer's owned media become another marketer's paid media—for instance, when an e-commerce retailer sells ad space on its Web site.

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行业分析师说，网上购物在今年零售业超过10亿美元的圣诞节销售中已成为主要力量。

Online shopping has become a major force in retailing this year with more than US$1 billion in Christmas season sales, industry analysts say.

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