英语语法分析

Objective Study on superantigen Pseudomonas aeruginosa exotoxin A (PE) and its relationship with accessory cell (AC).

目的研究铜绿假单胞菌外毒素A（PE）的某些抗原性及其与辅助细胞的关系。

The toxin may be formed within the pathogen and released when it dies (endotoxin), or secreted through its cell wall (exotoxin).

由病原体通过细胞壁向外分泌的毒素为外毒素。

Objective in order to isolate and purify an exotoxin of Streptococcus mitis which can cause toxic shock syndrome and investigate its pathogenicity.

目的分离与纯化致中毒性休克综合征缓症链球菌外毒素蛋白，并对其致病性进行初步研究。