Radioactive vitamine b12
[化] 放射性维生素B12
🧩 词语组成解析
n. 维生素, 维他命
🗣️ 情景例句
He's such a workaholic that he doesn't know how to spend his leisure time.
他是个工作狂，以至于不懂得如何打发他的空闲时间。
Look at the world through rose-coloured glasses.
对万事要乐观。
We need them urgently.
我们急需这些资料。