Seroconversion factors
[医] 血清转化因子
🧩 词语组成解析
n. [生][医]血清转化
n. 因素（factor的复数）
🗣️ 情景例句
The number's no longer in service.
这个号码现在是空号。
Yes, and I took many pictures.
是的，我还照了好多照片。
Li Lei went into the school and found Miss Zhao in the school library.
李垒走进学校，在学校图书馆里找到赵小姐。