Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
John Marchetta runs this company. John Marchetta
经营这家公司。
What? Already? Won't you have more coffee?
怎么，已经要走了？要不要再喝点咖啡？
I looked at it again.
我又看了看那副画。