🧩 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
Relax with the family and then look for some work.
与家人轻松一段时间 ，然后找个工作。
One drop of poison infects the whole tun of wine.
一滴之毒，毒染整桶之酒。
He also said that he had found five empty whisky bottles which the ghost must have drunk the night before.
他还说他发现了5只空的威士忌瓶子，肯定是鬼魂昨天晚上喝的。