Plifier
电子束半导体线性低通放大管
🗣️ 情景例句
I did not notice it until yesterday.
我一直到昨天才注意到它。
Would you care to see a movie tonight?
今晚你要不要去看电影？
It was beginning to get dark. I think we'd best stay the night here, I said.
天开始变黑。“我看我们最好在这里过夜，”我说，