浓缩精制的抗肺炎球菌血清的英文：
Banzhaf serum

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？

The serum comes from a tropical plant.
这种浆液产自一种热带植物。

The only available hyperimmune serum was of equine origin
唯一可得到的超免疫血清来源于马。