Phanotron
[电] 热阴极含气整流管
🗣️ 情景例句
Fine, thank you.
很好， 谢谢。
Know something like the palm of one's hand.
熟知其事，了如指掌。
Professor Ronald Bracewell, a leading American radio astronomer,argued in Nature that such a superior civilization, on a visit to our own solar system,
假如有如此高级文明生命访问了我们的太阳系，