Transanhydrisation
酐交换作用
🗣️ 情景例句
Happiness is a personal choice.
快乐是个人的选择。
How about Mary? How long has she lived there?
玛丽怎么样？她在那儿住多久了？
I had nearly reached the town, when the young man suddenly said, very slowly, Do you speak English?'
“你会讲英语吗？”