目的：研究血吸虫单次感染和多次感染两种方式对宿主肝纤维化的影响。

Objective: to study the degree of fibrosis in the host livers caused by single-infection and multiple-infection of schistosoma.

youdao

目的了解深圳市一种新的单链dna病毒(SENV)的感染流行状况。

Objective To investigate the prevalence of newly identified single-chain DNA virus (SENV) infection in Shenzhen.

youdao

与不服用药品的人相比，服用单种药品的人感染艾滋的比率减少62%，而服用组合药剂的人则减少73%。

There were 62% fewer HIV infections in the group on the single drug and 73% fewer HIV infections in the group that took the combination, compared with those given a dummy pill.

youdao