手机与癌症有关：现在要做的12种健康改变

4.    Make the switch. If you absolutely must place the phone against your head, switch ears regularly while chatting on a cell to limit prolonged exposure on one side, which has been linked to increased risk of brain tumors and salivary cancers on the side of the head where the phone is usually held.
4. 转换接听。如果你非常需要把手机放在耳边讲电话，那么谈话时定期转换耳朵接听，减少一边耳朵接触手机时间太长，增加这一边脑部患脑癌和唾液腺癌的风险。

5.    Avoid tight spaces. Don't make or take calls in elevators, trains, underground or in the car. On the plus side, cell phone use while driving is becoming increasingly against the law because it creates distraction.
5. 避免窄小空间。不要在电梯里，火车上，地铁上或汽车里打电话。另外，开车时候打电话逐渐变成违反法律，因为这样会分散注意力。

6.    Keep an eye on the bars. Don't use your phone when the signal is weak or when you're traveling at higher speeds in a car or train. This automatically boosts power to maximum as the phone attempts to connect to a new relay antenna.
6. 关注信号栏。 当信号不好，或在高速公路或铁路上穿梭的时候，不要打电话。这会自动地加强最大的功率，因为电话试图连接上新的天线。

7.    Ride the quiet car. Many trains have so-called quiet cars where cell use is prohibited and phones must be switched off so they don't disturb other riders. It's your best bet for traveling without overwhelming secondhand exposure to electromagnetic radiation.
7. 乘坐安静车厢。 许多火车都有所谓的安静车厢，在那里，禁止使用手机，而且手机必须关机，这样才不会影响到其他乘客。这使你旅途中不会二手接触大量的电磁辐射。

8.    Keep it short. A cell phone isn't what you want to use to catch up with an old high school buddy. If your conversation is going to be long, use a landline. Remember, brain tumor risk starts at a relatively low level of cumulative lifetime exposure.
8. 保持简短通话。 手机不是你用来联系一个高中老同学。如果你的谈话需要花长时间，就使用固定电话。记住，脑癌是由于长期短时间接触低手机辐射慢慢积累而形成的。