Calcium serum
[医] 血清钙
🧩 词语组成解析
serum
['sɪrəm]
n. <医>血清，血浆;浆液，树液;乳清;
🗣️ 情景例句
Good morning, sir. May I help you?
早安，先生。能为您服务吗？
What I have done is due to patient thought.
我的成就是由于坚忍地思索。
Two return tickets to London,please.
买两张到伦敦的往返票。