Plifier
电子束半导体线性低通放大管
🗣️ 情景例句
He and my Grandpa both went there.
他和我爷爷都曾在那儿读书。
How long have you studied English?
你学英语多久了？
Long car journeys are even less pleasant, for it is quite impossible even to read.
乘汽车作长途旅行则更加不舒服，因为连看书都几乎不可能。