Calcarea fluorica
[医] 萤石
🧩 词语组成解析
[医] 钙质纲
🗣️ 情景例句
I'm Elsa Tobin. How do you do?
我叫Elsa Tobin ，你好。
I did exercise last week.
我上星期做练习。
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。