Monogenism
n. 人类同源说
🗣️ 情景例句
It's a problem, isn't it?
这确实是个问题，不是吗？
You'd better see a doctor about that stomachache.
你胃痛最好去看医生。
May I? Thanks. Oh, this one is nicer than the other one. What's in it?
可以吗？谢谢。噢，这个比那个更好点儿。里面放的是什么？