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- The ship gave out radio signals for help. 船发出无线电信号求助。
- Tall buildings can distort radio signals. 高楼会破坏无线电信号。
- The satellite is sending out radio signals. 卫星正在发射无线电信号.
- A radio signal tells the pilot of an airplane when his plane is off the beam. 飞机脱离航道时，会有一个无线电信号告诉驾驶员。
- A radio signal was sent to the spacecraft. 向宇宙飞船发出了无线电信号。
- An electronic device that converts one frequency of a radio signal to another. 变频器将无线电讯号从一种频率转换成另一种频率的电子装置
- We couldn't locate the source of the radio signal. 我们无法确定无线电信号的来源。
- A radio signal travels very quickly. 无线电信号传播得很快。
- The radio signal can be amplified. 无线电的信号可以放大。
- The FM radio signal is somewhat like light. 多重通道FM无线电信号是有些象光。
- A radio receiver and directional antenna used as a system to determine the angular direction of incoming radio signals. 无线方向探测器一种无线电接收和指向天线系统，用来确定收到的无线电信号的角方向
- An apparatus used to transmit radio signals;a transmitter. 发报器用来传送无线电信号的仪器；发报机
- An apparatus used to receive radio signals; a receiver. 接收器用于接收无线电信号的仪器；收报机
- An apparatus used to transmit radio signals; a transmitter. 发报器用来传送无线电信号的仪器；发报机
- The radio signals emitted from these materials are detected. 从这些材料中发出的无线电信号被检测到了。
- A second part is the transmission link-a radio signal. 第二部分是传输线路--无线电信号。
- This radio signal has a frequency of 800000 cycles per second. 这个无线电讯号的频率是每秒八百千周。
- As we drove into the mountains, the radio signal faded. 当我们驶进山区时,无线电信号渐渐减弱了。
- The scanner emits a low-frequency radio signal, activating the microchip. 扫描仪会发出一些低周波的无线电信号，来激活微芯片。
- The part of a radio receiver by means of which radio signals are received. 通过接收无线电信号的无线电接收装置。
