Wathlingite
镁硬石膏
🗣️ 情景例句
Some rock 'n' roll.
一些摇滚乐。
What courses will you be taking this semester?
你本学期打算修什么科目？
On arriving in England, they were taken to the Crystal Palace by train.
一到英国，火车就把他们送到了水晶宫。