Epimer
n. [化]差向(立体)异构体,差位(立体) 异构体
🗣️ 情景例句
Susan Stewart's office.
Susan Stewart办公室。
Grocery bills are expensive.
食品价格昂贵。
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，