Epimer
n. [化]差向(立体)异构体,差位(立体) 异构体
🗣️ 情景例句
Oh, good.
噢， 好了。
Ambition never dies until there is no way out.
不到黄河心不死。
The dog's in the garden, too.It's running across the grass.
狗也在花园里。它正在草地上跑，