酸化血清与酸化补体的英文：
acidified serum,acidified complement

acidified是什么意思：
n.酸化的
serum是什么意思：
n. （免疫）血清；浆液

serum cholinesterase activity
血液胆碱脂酶活性

Therapeutic serum levels remain undefined.
治疗血药浓度尚无定论。

When was the last time you took the serum?
你上一次注射血清是什么时候？

complement是什么意思：
v. 补充，补足
n. 补充；补充物，补足物；补语

objective complement
ph.1. 【语】宾语补语

The secant of the complement of a directed angle or arc.
余割有向角的余角或弧的余割

The absence of complementation suggests that they are in the same gene.
凡是没有互补作用的，就说明它们属于同一基因。