Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
I gave that idea up a long time ago.
我很久以前就放弃了那个想法了。
A bird may be known by its song.
什么鸟唱什么歌。
No hurry! Please take your time!
甭着急！请慢慢看！