Empretron
汞弧离子管
🗣️ 情景例句
You are the right man for the job.
你正适合做这项工作。
They must hunger in frost that will not work in heat.
少壮不努力，老大徒伤悲。
I spent the whole day in my room, but I did not write a single card!
我在房间里关了整整一天。然而竟连一张明信片也没写成！