Nitrocalcite
钙硝石
🗣️ 情景例句
Mr. Lu, everything is OK. Your booking is from today through Wendnsday. Single room.
陆先生，没问题的。您从今天订到星期三，单人房。
His name is John Smith.
他叫约翰、史密斯。
I'll be there.
我会去的。