Sievert
unit [核]西韦特单位(γ射线剂量单位)
🗣️ 情景例句
What's your name?
你呢？
Fine, thanks. And you?
很好，谢谢，你呢？
That sounds interesting. That was a hundred years ago, wasn't it?
听起来很有意思。那是一百年前的事了，不是吗？