Human and animal studies examining brain wave patterns, cognition and behaviour after exposure to RF fields, such as those generated by mobile phones, have not identified adverse effects.

对接触射频场(例如移动电话所产生的射频场)之后的脑波模式、认知和行为进行研究的人体和动物研究未确认不良影响。

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Some people perceive risks from RF exposure as likely and even possibly severe.

有些人认为接触射频的危险性可能存在，甚至可能很严重。

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Cancer: Current scientific evidence indicates that exposure to RF fields, such as those emitted by mobile phones and their base stations, is unlikely to induce or promote cancers.

癌症：目前的科学证据表明，对射频场，诸如移动电话及其基台发射的射频场的接触不大可能引发或促发癌症。

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With the government expected return, we want to make that expected return as a fourth asset-- rf we could call it r4 but I'll call it rf-- it's a special asset.

根据政府的期望收益率，我们将其作为第四种资产-,可以称之为r4，我们写成-,这是个特殊的资产。

耶鲁公开课 - 金融市场课程节选

There are another 257, 000 jobs at nine suppliers in the U.S. working on its behalf, such as Corning, Texas Instruments, Samsung, Fairchild Semiconductor and RF Micro Devices--as well as the drivers at UPS and FedEx who deliver Apple products to customers.

FORBES: Magazine Article

Retailers such as Wal-Mart are testing the RF tag idea to track inventory in transit, but the high cost per tag has been a problem.

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Again, you have to deal with signal issues in high-RF noise environments, deal with materials issues acting as RF shields (like in many computer rooms or anything with lots of metal in it), and you have to balance the convenience with the somewhat-increased security risk.

FORBES: Got Wires?