“ecological trend study”的概念、定义、翻译、参考文献-科学参考

单词	ecological trend study
释义	ecological trend study Encyclopedia 医学生态趋势研究释 ecological trend study生态趋势研究连续观察目标人群中某因素平均暴露水平的改变和某种疾病的发病率、死亡率变化的关系，了解其变动趋势；或者通过比较暴露水平变化前后疾病频率的变化情况，来判断两者间关系的群体研究。
随便看	number interval number language number length number line number-magnitude distribution number manifold number module number needed to harm number needed to treat number notation number of a word number of boundaries number of checks number of classes number of collisions number of colors number of columns number of combinations number of comment number of components number of compositions number of covering sheets number of crimes number of crossings of a graph number of degree of freedom

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