Anakrom
硅藻土型色谱载体
🗣️ 情景例句
I have a call to make.
我需要打个电话。
Sorrow comes unsent for.
悲哀来时不须邀。
There are eighteen floors in the building, and he lives on the fifteenth floor.
这幢大楼有18层。他住在第15层。