Radioactive isotope
[机] 放射性同位素
🧩 词语组成解析
🗣️ 情景例句
He's always made me feel like his own daughter.
他总是让我觉得我是他的亲生女儿。
Can anybody scratch my back for me?
有人来替我搔背吗？
I'm afraid I don't have it any more. I sold it last week.
我恐怕是没有了，上星期我把它卖掉了。