名词
中文翻译：应答机
同义词：
['transmitter', 'transponder', 'transponder set']
例句：
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1. The transponder is used to transmit signals from one location to another.
这个应答机用来从一个地点向另一个地点传输信号。
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2. The transponder was designed to detect and warn of incoming aircraft.
这个应答机被设计用来检测和警告即将到来的飞机。
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3. The transponder was a critical component of the communication system.
这个应答机是通信系统的一个关键组成部分。