Epimeric
差向异构体的
🗣️ 情景例句
You're right. Of course.
说得也是。
The agricultural region is centered largely in the north.
那里的农业区大部分集中在北部。
but I lacked for nothing, for he was both father and mother to me.
但我却什么都不缺，他既当父亲又当母亲。