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。
China's installed power generation capacity and highway length both rank the second place, and Numbers of fixed telephone and mobile phone subscribers are number one in the world.
我国装机容量、高速公路位居世界第二，固定电话、移动电话用户数位居世界第一。
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