Epimeric
差向异构体的
🗣️ 情景例句
I take after my mother's family.
我像我母亲家的人。
Some students quit school due to poverty.
一些学生因贫困而辍学。
I've never laughed so much in all my life.
我这一生还从来没有笑得这样开心过呢。