Cobaltamine
[化] 钴胺素; 维生素B12
🗣️ 情景例句
There are four of us including my parents, a younger sister and me.
有四口人，父母亲、妹妹和我。
I can't do two things at the same time.
我只有一双手。
Yes, that's right. Good!
对，正确，很好！