Transanhydrisation
酐交换作用
🗣️ 情景例句
When will you be through with your homework?
你的家庭作业什么时候可以做完？
So, you see...
所以啊，你该知道……
The children were leaving school on Tuesday when they saw a truck.
星期二，孩子们正放学回家，这时，他们看见一辆卡车。