🧩 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
unit
['ju:nit]
n. 单位，单元;装置;个体;[数]单位数;
🗣️ 情景例句
I'm glad you feel you've finally put it all together.
我很高兴你终于就绪了。
To scream for his breakfast
想吃早餐而大喊大叫。
Thanks. I think we have everything. Thank you for having us.
多谢。我想我们没忘记什么东西。