It limits the duration of your exposure and keeps the phone farther away from your head and body.

这样会限制你接触手机的持续时间，使手机远离你的头部和身体。

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In addition to using "hands-free" devices, which keep mobile phones away from the head and body during phone calls, exposure is also reduced by limiting the number and length of calls.

除使用“免提”装置在通话时将移动电话与头部和身体保持一定距离以外，限制通话次数和时间，也会减少接触量。

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Exposure to the radiofrequency fields generated by mobile phones does not cause head pain or increase blood pressure, according to a Norwegian study.

挪威一项最新研究表明，置身手机所产生的射频场不会导致头痛或血压升高。

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"If you're looking at Junior Seau's situation, " Guskiewicz said, referring to the NFL star who recently committed suicide, "he was off the charts in terms of exposure" to head injuries.

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