Epimeric
差向异构体的
🗣️ 情景例句
I'll do it. I'll talk to them.
我来做， 我去跟他们谈一谈。
I hope that I can make a worthwhile contribution to the efforts of this group.
我希望能对这个团体努力的成果提供有价值的贡献。
He looked very angry.
他看上去非常气愤。