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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It is hoped the break-through will be able to create safer hands free mobile phones to help the disabled and elderly and help out professionals in high pressured working environments.

他们希望利用这项技术为残疾人，行动不便的老年人，以及高压工作环境下的工作人员研制出更安全且不用双手的手机。

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In contrast, research has clearly shown an increased risk of road traffic injuries when drivers use mobile phones (either handheld or "hands-free") while driving.

相反，研究结果却清楚地表明，由于驾驶员驾车时使用移动电话(无论是手持还是“免提”)，发生道路交通伤害的危险会加大。

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We've encountered a few mobile phones that integrate music playing and include stereo headphones that double as a hands-free headset.

FORBES: Mixing Music And Mobile Phones