Cobalamine
[化] 钴胺素
🗣️ 情景例句
I'm a senior here, so let me know if I can help you with anything.
我是大四的老生，有什么能帮忙的尽管说一声。
She refuses to make up her mind.
她拒绝下决心。
Were you afraid?
你害怕吗？