Serolysin
血清溶素
??? 情景例句
I don't see why you are kicking up such a fuss.
我不明白你為什么要這樣小題大作。
Excuse me, I'd like to ask you a question.
對不起，我可以問個問題嗎？
No, we come from the USA.
不，我們是美國人。