Febetron
冷阴极脉冲, β射线管, 相对论性电子发生器
🗣️ 情景例句
I hope I'll go down in history as a famous English professor.
我希望成为未来历史上有名的英文教授。
I hope he will meet me at the airport.
我希望他能到机场接我。
There are a lot of people in the swimming pool.
游泳池里挤满了人。