Plitron
[电] 高度真空管
🗣️ 情景例句
Attending school is compulsory in this country.
这国家衽的是义务教育。
Wealth is not his who has it, but his who enjoys it.
财富并不属于拥有的人，而是属于享用的人。
Twenty year!That's long time.
20年！这个时间可不短。