Immune serum
[化] 免疫血清
🧩 词语组成解析
serum
['sɪrəm]
n. <医>血清，血浆;浆液，树液;乳清;
🗣️ 情景例句
My visa is multi-entry; it allows me to exit the country and then re-enter, as ofter as I like.
我的签证是往返签证，我可以随便进出这个国家。
With my heart in my boots, I went into the dark room.
我战战兢兢地走进那黑洞洞的房间。
The towers are further apart at the top than at the base, but this is no mistake.
两座塔楼的楼顶之间的距离比楼底之间的距离要大一些，但是这并不是错误。