Preamp
n. （无线电）前置放大器
🗣️ 情景例句
By the way, how is your wife doing, Harrison?
顺便问一下，贵夫人近来可好吗？
How big?
多大？
Yes, he did.He telephoned at nine o'clock.
是的，打了。他在9点钟又打电话。