Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
Did you go to Michigan too, Grandpa?
爷爷，你也上Michigan吗？
I must play my spare time well, or I end up doing nothing.
我必须善于利用空闲的时间，否则生命将会在无所事事中告终。
There are some good apples over there.
那边有些好苹果。