Epimeric
差向异构体的
🗣️ 情景例句
OK. Let's have a look at it.
好，让我们来看看。
I'm leaving tomorrow,but I haven't packed my suitcases yet.
我明天将离开，但是我还没收拾好行李。
In the light of this statement, teachers live by selling knowledge,
根据这种说法，教师靠卖知识为生，哲学家靠卖智慧为生，