Radioactive purity
[化] 放射性纯度
🧩 词语组成解析
🗣️ 情景例句
My instructor thought that the beginner's class was too easy for me.
老师认为初级课程对我来说太容易了。
Why did you hate it so much?
为什么你那么恨它？
He had no sooner returned than he bought a house and went to live there.
他刚一回到英国便买下了一幢房子住了进去。