Sievert
unit [核]西韦特单位(γ射线剂量单位)
🗣️ 情景例句
That's a good buy.
那买得便宜。
Sorry, sir. But it's our graduation day.
对不起，不过，今天是毕业的日子嘛。
It's very hot. It's summer in Australia now!
很热。澳大利亚现在正值夏天！