If yes, you've got to start enforcing new phone usage laws and policies within your company.

如果是的话，你就必须开始执行新的手机使用的法律和政策在你的公司。

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To date, there have been no long-term studies on the effects of cell phone usage among children.

到目前为止，没有做过儿童中长期使用手机的研究。

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That is why Nielsen, an American firm that monitors television viewership, bought Telephia, a firm which tracks mobile-phone usage, last month

在上个月，一家名为Nielsen的美国收视率掌控公司收购了一家名为Telephia的跟踪调查移动电话习惯用法的公司，其原因就在于此。

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But,on the other hand, Ms.Teltscher says mobile phone usage has reached sixty-eight percent in developing countries.

VOA: special.2010.10.25

Founded in 2009, the service aggregates anonymized data, such as mobile phone usage and other data.

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One possibility is that years of cell phone usage has conditioned us to anticipate the arrival of new messages.

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Cell-phone usage and Internet access has also taken off in South Korea over the last five years.

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