prevalencen.传播;流行;普及
prevalence rate epidemiology流行病学
Prevalence of schistosomiasis血吸虫感染率
prevalence rate of tuberculosis结核病患病率
prevalence rate of osteoporosis骨质疏松患病率
Prevalence rate of birth defect出生缺陷发生率
prevalence disease investigation流行病调查
Prevalence rale of chronic disease慢性病患病率
Prevalence rate of chronic diseases慢性病患病率
Prevalence of exotropia and esotropia.外斜视和内斜视分别占43。