Cobalamine
[化] 钴胺素
🗣️ 情景例句
There's a park over there. Let's walk in the park for a while.
那边有个公园。我们去散散步吧！
Can I fix you a drink?
我给你调饮料好吗？
I'd like to know something about your foreign trade policy.
我非常想了解有关贵国对外贸易的政策。