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1. The hemi receiver is the part of the radio that converts the incoming signal into an audible sound.
半接收器是收音机的一部分，它将进来的信号转换成可听见的声音。
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2. The hemi receiver has a high sensitivity and can pick up signals from far away.
半接收器灵敏度高，可以从远处接收信号。
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3. The hemi receiver is used to amplify weak signals, making it easier for us to hear them.
半接收器用于放大弱信号，使我们更容易听到它们。