Smectites
蒙脱石类
🗣️ 情景例句
Typing is easy once you get the hang of it.
一旦你掌握诀窍，打字就很简单。
What is the color of your new book?
你的新书是什么颜色的？
'Can I return these two tickets?' he asked.
“我可以退掉这两张票吗？”他问。