Why are cellphones so popular, especially among teenagers? The answer.为什么手机这么受欢迎, 尤其在青少年当中? 答案.Even Forman, who tells patients their cellphones may be risky, owes one.就连告诉病人手机可能有风险的人们自己也有一部手机.Radio waves control everythi...

No matter where I go, I see people on their cellphones, messaging.无论我走到哪儿, 都能看到人们在手机上收发短信.AM Our presentation will begin shortly , please silence cellphones and pages.55AM我们的演示即将开始, 请各位关闭手机和寻呼机或者调整为震动. 寻呼机?Why are cellph...