Preamp
n. （无线电）前置放大器
🗣️ 情景例句
I never met before.
我从未谋面过的人。
You can't make something out of nothing.
巧妇难为无米之炊。
Mr.Taylor, the owner of a jewellery shop was admiring a new display.
珠宝店主泰勒先生正在欣赏新布置的橱窗。