Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
Good-bye.
再见。
As this is a special offer, we hope you won't miss this opportunity.
因这是特殊报价，希望您不要错失良机。
You just don't consider anyone but yourself.
你除了自己外从不为别人考虑。