Epimeric

差向异构体的

🗣️ 情景例句

It's about my grandfather.
是关于我爷爷。
Do you have an appointment?
你有预约吗?
At last he said,I think I can help him. He'll be OK if I do one small operation.
“我想我能治他的病。只要我给他做一个小手术,他就会好的。”
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