Emitron
[电] 阴极发射管
🗣️ 情景例句
Are you still doing your photography?
你还在搞摄影吗？
Friends are lost by calling often and calling seldom.
交往过密过疏，都会失去朋友。
Forty-two years later a tunnel was actually begun.
42年以后，隧道实际已经开始建了。