您使用过移动电话吗?如果用了,还记得什么时候第一次用到它吗?真正普及的民用移动通讯只有短短的二十年历史,相信你第一次用手机的时间绝不会在二十年前。但短短的二十年间,移动电话已经有了巨大的变化。最早的民用移动电话,称作模拟式移动电话系统,出现在1978年美国的芝加哥, Have you ever used a mobile phone? If yes, remember when you first used it? The only popular mobile communication in the world is just a short 20-year history. I believe the first time you use a mobile phone will never Twenty years ago. But in just two decades, the mobile phone has undergone tremendous changes. The earliest civilian mobile phone, called analog mobile phone system, appeared in the United States in 1978, Chicago,