Epimerism
差向异构
🗣️ 情景例句
We haven't had any complaint of this kind. Is there any evidence.
我们还从未听过这样的抱怨。有什么证据呢？
It will take me several hours if I really look at everything.
如果全部参观的话，那得需要好几个小时。
Is it Alexander Bell?
是亚历山大·贝尔吗？