Phanotron
[电] 热阴极含气整流管
🗣️ 情景例句
This is not the way to spend our fifth anniversary.
这不是我们过五周年纪念日的方式。
Knowledge is a treasure, but practice is the key to it.
知识是一座宝库，实践是打开宝库的钥匙。
Yes, she is.
是的，她在开门。