Diastereoisomeride
非对映异构体
🗣️ 情景例句
He is equal to the task.
他胜任这个工作。
Knowledge without practice makes but half an artist.
只有知识而无实践，只能造就半瓢水的艺术家。
You always say that,but we never win anything!
你老是那样说，但是我们从来没赢过！