“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	Feller feller buncher Feller coin-tossing constant Feller condition Feller-Lévy condition Feller process Feller semigroup Feller theorem Fellgett advantage felling Felling for Palace Cliffside Inscription at Cixiaogou felling licenses Fellow Officials Group of the Year Jiashen fellowship fellow traveller property felon felr felsenmeer FELT felt felt disease felting property of wool felt polisher felt reinforcements felts and blankets

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