Radioactivity activity
[机] 放射性
🧩 词语组成解析
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
Fortunately, I found his house at once.
很幸运地，我立刻找到他家。
I'm sorry, sir. I didn't mean it.
对不起，老兄，我并没有恶意。
Above all, he refused to make any personal gain from his political work.
尤其是，他拒绝从所从事的政治事业中谋取个人利益。