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
Oh, I'm glad you like it.
哦，知道你喜欢，我很高兴。
If I get my work finished in time,I'll leave for New York Monday.
如果我把工作及时完成了，我将星期一去纽约。
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。