Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
Listen to the sounds of the summer that surround us.
仔细倾听环绕我们的夏夜声息。
I'll call you up later.
我稍后会打电话给你。
No wonder people say that computers are taking over the world.
难怪有人说电子计算机正渐渐接管世界。