“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	screw calculus screw compressor screw conveyor screw diad screw dislocation screw dislocations screw displacement screw drive screwdriver screw eyepiece micrometer screw groove sealing line screwing screw instability screw line screw mechanical supercharger screw mechanism screw micrometer screw microscope screw moment screw motion screw operation screw pinch screwpine family screw pitch screw press

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