English-Chinese/The main difference between the two mobile cellular systems (1G and 2G), is that the radio signals used by 1G networks are analog, while 2G networks are digital

The main difference between the two mobile cellular systems (1G and 2G), is that the radio signals used by 1G networks are analog, while 2G networks are digital.

两种手机系统（1G和2G）之间的主要区别在于1G网络使用的无线电信号是模拟的，而2G网络是数字的.