Age period cohort model is widely used by epidemiologists to analyse trends of chronic diseases. The statistical model provides a useful modification for traditional descriptive epidemiology.
年龄时期队列模型广泛应用于描述性流行病学来分析慢性病发病率和死亡率变化趋势，它改进了传统的疾病描述性分析方法。
It was not until the later period of feudal society that painters finally disengaged themselves from "preaching" and started paying more attention to descriptive details in paintings.
而到了封建社会的后期，画家才脱离纯然的“教化”目的，开始重视作品的细节中描述性。
It was not until the later period of feudal society that painters finally disengaged themselves from "preaching" and started paying more attention to descriptive details in paintings.
而到了封建社会的后期，画家才脱离纯然的“教化”目的，开始重视作品的细节中描述性。
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