Permatron
[计] 磁控管
🗣️ 情景例句
That's it.
就这样。
Don't speak all you know, but know all you speak.
不要尽言所知，而要尽知所言。
This result merely confirms earlier American and British studies:
结果仅仅确认了美国人和英国人早期的研究：