Nitrocalcite
钙硝石
🗣️ 情景例句
We had a great time, Mom.
我们玩得非常开心，妈妈。
I understand that the majority of employees here are Chinese.
我听说雇员中的大多数是中国人。
He no sooner recovers his equilibrium than the next porpoise comes along and hits him another crack.
海龟刚恢复平衡，第二只海豚又冲过来猛击一下。