“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	North China Literature North China Map North China Pictorial North China Quyi School North China Union University North China Working Committee on Operatic Music North China（continental massif）minerogenetic province North Chinese Phonology North Chinese sounds North Chungcheong Northcliffe Revolution North Dakota State North door of St.Baptist North Duisburg Landscape Park Northeast Agricultural University Northeast area revitalization plan Northeast Army of Volunteers in the Anti-Japanese War Northeast Asia race North-East Atlantic Fisheries Commission northeast China Dagu ballad Northeast China dagu storytelling Northeast China Literature and Art Association Northeast China Tiger and Leopard National Park System Pilot Site northeast Chinese brown frog North-East District

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