调制解调器默认值

例句：

1. 1. The computer needs a modem to connect to the internet.
   这台电脑需要调制解调器才能连接到互联网。
2. 2. He installed a new modem in his house.
   他在房子里安装了一个新的调制解调器。
3. 3. The modem is responsible for converting digital signals back into analog signals.
   调制解调器负责将数字信号转换为模拟信号。