R-f amplifier
[电] 射频放大器
🧩 词语组成解析
🗣️ 情景例句
Jazz music is performed at many dinner parties.
在很多宴会派对里都有爵士乐的演奏。
What were you doing when I called you on the telephone?
当我打电话给了你时，你正在做什么？
Here you are!
给你！