Preamp
n. （无线电）前置放大器
🗣️ 情景例句
If you go camping, at night you'll hear all the nocturnal animals.
如果你去野营，晚上可以听到动物的夜歌。
Enough! Shut up!
别多嘴。
There is no doubt about it.
那是毫无疑问的。