Calcarea
[医] 钙质纲
🗣️ 情景例句
Keeping busy. Yourself?
一直很忙，你呢？
I asked him to paint it for me, but he wouldn't
我请他帮我油漆，但是他不肯。
We would be glad to start business with you.
我们很高兴能与贵公司建立贸易往来。