Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
They can keep a record of all of the important dates
他们可以记录下重要的日子。
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么？
Who died and made you king?
你算哪根葱？