R-f amplifier
[电] 射频放大器
🧩 词语组成解析
🗣️ 情景例句
Hi, Grandpa.
嗨， 爷爷。
Six feet of earth makes all men equal.
在墓穴中人人都平等。
the young man has a glorious future before him and the old one has a splendid future behind him:
青年人有光辉灿烂的前景，而老年人的辉煌已成为过去。