Epimeric
差向异构体的
🗣️ 情景例句
You made a tough decision.
你做了一个困难的决定。
The tortoise wins the race while the hare is sleeping.
兔子睡大觉，乌龟跑第一。
Thanks. Oh, this is too small. Do you have a big piece, please?
谢谢。噢，这张太小了。请问你有一张大的吗？