Radiotron
真空管, 三极电子管
🗣️ 情景例句
He actually took me to meet his foreman.
事实上他带着我去见他的工头。
I'm exhausted.
我疲倦不堪。
I have just received a letter from my old school, informing me that my former headmaster,
我刚刚收到母校的一封信，通知我说以前的校长