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We are using this transistor to amplify a telephone signal. 我们正在使用这种晶体管来放大电话信号。
Dual-tone multi-frequency (DTMF) signalling was originally designed for telephone signalling over high quality voice telephone lines. 双音多频编码（DTMF）技术最早用于高质量语音电话线路上的电话编码，现广泛用于控制和数据通信系统。
In technical terms, the computer signal is "digital", and the telephone signal is "analog". 用专业术语来说，计算机信号是“数字的”，而电话信号则是“模拟的”。
As a reliable transport protocol, RUDP networks for the transmission of IP telephone signal. 作为一个可靠传输协议， RUDP 用于传输 IP 网络间的电话信号。
SIP is an IP telephone signaling protocol proposed by IETF. SIP是由IETF提出的IP电话信令协议。
As a reliable transmission protocol, RUDP IP network for transmission of telephone signals. 作为一个可靠传输协议，RUDP用于传输IP网络间的电话信号。
In 1964 a group of 17 countries set up an organization for sending telephone signals by satellite. Their first satellite was called Early Bird. 在1964年，17国集团成立了一个通过卫星传送电话信号的组织。他们的第一颗卫星叫“晨鸟”号。
To use a dial-up connection , you need a hardware device to convert computer signals to telephone signals and back a gain. 为了能使用拨号连接，你需要一个能把计算机信号和电话信号相互转换的硬件装置。
To use a dial-up connection, you need a hardware device to convert computer signals to telephone signals and back a gain. 为了能使用拨号连接，则需要一个能把计算机信号和电话信号相互转换的硬件装置。
push-button telephone signal receiving circuit 按钮话机信号接收电路
Radio Telephone Signal Procedure 无线电信号规程
telegraph telephone signal convertor 电报电话信号变换器
A kite dangles from a telephone wire. 一只风筝悬挂在电话线上晃来晃去。
Let me note down your address and telephone number. 让我记下你的地址和电话号码。
He banged into a telephone booth and hurt his leg. 他撞在了一个电话亭上，伤了腿。
He put the telephone bill down as a business cost. 他把电话费用作为办公费记下。
The car dashed against a telephone booth. 那车子猛地撞在一间电话亭上。
A red light is usually a signal of danger. 红灯通常是危险的信号。
He got in by pretend to be a telephone engineer. 他假装成电话工程师进来的。
She can always be reached by the office telephone. 打电话到办公室去总能找到她。