Sievert
unit [核]西韦特单位(γ射线剂量单位)
🗣️ 情景例句
Fine. We were just wondering about this trunk.
好啦。我们正纳闷这只大衣箱呢。
Who are you writing to?
你正在写信给谁？
It is being repaired by a friend of my father's.
父亲的一个朋友正在修理这件乐器。