Yersin's serum
[医] 鼠疫血清
🧩 词语组成解析
serum
['sɪrəm]
n. <医>血清，血浆;浆液，树液;乳清;
🗣️ 情景例句
What does that mean in plain English?
你能不能用大白话解释一下？
I stayed and did some extra work.
我留下加了一会儿班。
I received an invitation, but I did not accept it.
我收到-份请帖，但没有接受。