“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	ground penetrating radar ground plane ground positioning orientation and aiming system ground power supply and distribution test equipment ground pressure ground pressure around openings ground pressure around shaft ground pressure in stopes ground pressure management ground propagation ground proximity warning system ground radiation ground receiving station ground receiving station for meteorological satellite ground release test of airborne ground remote sensing ground resolution ground resolution principle ground resonance test ground ring ground road ground robot ground roll ground rolling dragon ground rope

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