Preamp
n. （无线电）前置放大器
🗣️ 情景例句
What are you working on?
你在干什么？
You can receive our program at short wave 37.5 MH.
你可在短波37.5赫兹上收到我们的节目。
Late? No, you aren't. You're early. It's Sunday today !
晚了？没有啊！你挺早的呢，今天是星期日。