Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
I'm Richard. What's your name?
我是Richard！你叫什么？
At twelve o'clock midnight people blow horns, yell, and kiss each other to welcome in the New Year.
到了午夜十二点，大家都吹吹喇叭、高声喊叫、相互接吻来庆祝新年。
That's OK.
可以。