Febetron
冷阴极脉冲, β射线管, 相对论性电子发生器
🗣️ 情景例句
It's important for you to keep a cool head at this moment.
这时候保持头脑冷静是很重要的。
When an opportunity is neglected, it never comes back to you.
机不可失，时不再来。
Yes, we do.
有。