Epimer
n. [化]差向(立体)异构体,差位(立体) 异构体
🗣️ 情景例句
They took every last dime.
他们拿走了所有的钱。
Nothing is impossible (or difficult) to the man who will try.
天下无难事，只怕不努力。
The third, or main wave,
第三种波，即主波，