Epimerization
差向[立体]异构(作用)
🗣️ 情景例句
U2 are touring here in October, and I hear they put on quite a show.
U2 八月份将来这里做巡回演出，我听说他们的表演很卖力。
No, I can't go to bed till she says Good night to me.
不，除非她向我道晚安，不然我睡不着。
They finally found a small gold coin which was almost worthless.
但最后找到的是一枚几乎一钱不值的小金币。