Radiotron
真空管, 三极电子管
🗣️ 情景例句
(looking at his calendar) Oh, next Friday is May 4th.
（正在看着日历）哦，下周五是五月四号了。
Never deter till tomorrow that which you can do today.
今日事须今日毕，切勿拖延到明天。
No, I didn't do that either. I just washed it in cold water.
不，我也没有那样做。我就是用冷水洗的。