Results from individual participating countries have suggested an association between more than 10 years of mobile phone usage and some tumours.
个别参与国的调查已经表明了连续10年以上的手机使用和肿瘤的某种联系。
Internet usage, mobile phone usage, advertising dollar spend - all have grown enormously over the last 15 years to provide a stronger foundation underneath the latest boom.
互联网应用、手机应用、广告支出——所有这些在过去15年中都有了巨大的增长，为最新一轮繁荣提供了更强有力的支持。
In the long run most national differences will disappear, predicts Scott Campbell of the University of Michigan, author of several papers on mobile-phone usage.
密歇根大学的ScottCampbell写过几篇有关移动电话使用的论文，他预测说：长远来看，不同国家间的差异最终多数会消失。
In the long run most national differences will disappear, predicts Scott Campbell of the University of Michigan, author of several papers on mobile-phone usage.
密歇根大学的ScottCampbell写过几篇有关移动电话使用的论文，他预测说：长远来看，不同国家间的差异最终多数会消失。
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