发射机应答器 [电讯] transponder
- 发射机应答器便会自动发出信号。
The transponder automatically sends out a signal. - 发射机应答''。'器'。''一种收到预定信号之后就开始发射信号的无线电或雷达发射接收机。
A radio or radar transmitter-receiver activated for transmission by reception of a predetermined signal. - 无线频率识别技术的最早运用可以追溯到第二次世界大战,那时无线电发射机应答器帮助人们分辨轴心国和同盟国的战机。
The roots of radio-frequency identification technology stretch at least as far back as World War II, when transponders helped distinguish between Axis and Allied aircraft.
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