Epimeric
差向异构体的
🗣️ 情景例句
I think I'll need your expert assistance this afternoon.
我想，我今天下午需要你专业的协助。
There is no place like home.
再好之处不如自己家。
No, they aren't. They're their books.
不，不是我的。这些是他们的书。