Calcsinter
[化]钙华, 石灰华, 多孔石灰岩
🗣️ 情景例句
Why don't you go to your room, Mom, and get some sleep.
为什么不到你的房间去？妈妈， 去睡一会儿。
What does she mean by canceling her performance?
她取消自己的演出是什么意思？
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，