知识贝壳
知识贝壳
所属栏目：英汉双解生物学
The study of diseases affect-ing large numbers within a population. Theseinclude both epidemics of infectious diseasesand also diseases associated with environ-mental factors and dietary habits (e.g. lungcancer,some forms of heart disease,etc.).研究群体内对大多数人 ......（本文共 275 字 ） [阅读本文] >>