以下为句子列表：
英文: Modem - An abbreviated term for modulator-demodulator.A modem converts digital signals into analog signals (and vice versa), enabling computers to send and receive data over the telephone networks.
中文: 调制解调器--是“调制器和解调器”的缩写。调制解调器可将数字信号转换成模拟信号（反之亦然），能使电脑在电话网上发送和接收数据。
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英文: Refer to subscribers who carry small-size pagers and receive audio signals, digital signals or character signals sent out by city telephone through wireless paging center within assigned area.
中文: 指携带小型寻呼机，接收市话用户通过无线寻呼中心，在规定范围内向其发出声音、数字或文字显示的信息的用户。
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英文: Subscribers of Paging Services refer to subscribers who carry small size pagers and receive audio signals, digital signals or literal signals sent out by city telephone through wireless paging center within assigned area.
中文: 无线寻呼电话用户指携带小型寻呼机，接收市话用户通过无线寻呼中心，在规定范围内向其发出声音、数字或文字显示信息的用户。
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英文: These analog signals must be converted to digital signals for use by the computer; conversely, digital signals from the computer must be converted into analog signals for use by analog devices.
中文: 这些模拟信号必须被转换成数字信号才能被计算机使用，相反的，数字信号必须被转换成模拟信号才能被模拟设备使用。
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英文: To smooth the transition, the FCC allows broadcasters to deliver both analog and digital signals over the TV spectrum (channels 2 to 69).
中文: 为了顺利完成转移，通信委员会允许电视业者在电视频谱（2~69频道）中同时发射类比与数位讯号。
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