Unit of radioactivity
[医] 放射能单位, 辐射能单位
🧩 词语组成解析
unit
['ju:nit]
n. 单位，单元;装置;个体;[数]单位数;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
radioactivity
[,redɪoæk'tɪvəti]
n. 放射（性）;辐射能;
radio光线+act行动，做+ivity表示情况、状态、“...性”、“...力” →放射性；[核] 放射能力；[核] 放射现象
🗣️ 情景例句
And here are your keys.
你的钥匙。
Do you want to remit the money by air mail or by cable, sir?
您想要航空信还是电汇，先生？
Even this was remarkable, considering that she had had so many delays.
但考虑到路上的多次耽搁，这个成绩也已很不容易了。