The shoe companies have realised there is a problem and taken action, now it's up to the supermarkets to follow that lead.

这些制鞋企业已经意识到问题的存在并且采取了行动，现在那些大型超市该紧随其后了。

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Part of the problem is that cancer can take decades to appear, so only a lengthy follow-up will expose an increase in its incidence.

一部分原因在于，癌症的出现往往要经历数十年，因此，要想揭示其导致癌症发生率的增加，必须要对实验对象进行长时间的跟踪。

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The problem is, a follow-up study failed to confirm that this planet even exists, astronomer Francesco Pepe at the Geneva Observatory in Switzerland found.

问题在于，瑞士的日内瓦天文台的天文学家 Francesco Pepe 之后的研究却连这课行星是否存在都无法确定。

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In this scenario, however, there can be many unexpected findings that have not been reported in medical journals and likely never will be the subject of published follow-up studies because the problem of researching these multitudinous findings simply cannot scale.

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Merck denies there's any such problem for either Vioxx or follow-up Arcoxia, and plans to conduct new studies to prove it.

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The only problem was that this promise ended up being an intention without effective follow-through.

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