Radiotron
真空管, 三极电子管
🗣️ 情景例句
I haven't got anything to do now; I'm so bored.
我现在无事可做，感觉很无聊。
As you can see in this photo, we've retained the same style which was so popular in this old model.
正如你在这张图片上所看到的，同风格的这种旧型产品非常流行，我们保留了它。
We can do that at the meeting tomorrow.
我们明天开会时再签订吧。