Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
I'm still learning.
我还在学习当中。
Live and learn.
活到老，学到老。
But I was delighted to be able to say words that my family and a few friends could understand.
是，我却感到欣喜，能够说出我家里人和一些朋友可以理解的词语。