1. 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。
2. taking part in a radio or tv program. 
   参与到收音机或电视节目中。
3. the part of a radio system that transmits signals. 
   收音机中发射无线电信号的部分。
4. a two-way radio communication system (usually microwave); part of a more extensive telecommunication network. 
   一种双向的无线电通讯系统（通常是微波）；较广阔的长途通讯的一部分。
5. A device, such as a part of a radio, television set, or telephone, that receives incoming radio signals and converts them to perceptible forms, such as sound or light. 
   接收器在诸如收音机、电视机和电话中的一种装置，可以接收传播的信号并将其转换成可接触的形式，如声音或光线

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