目的：心血管系统疾病的多发性和高发性是医学研究的重要课题。

Objective: It is an important research topic of cardiovascular system disease's high incidence rate.

youdao

目的：心血管系统疾病的多发性和高发性是医学研究的重要课题。

Objective: It is an important research topic of cardiovascular system disease's high incidence rate.

youdao