“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	low power light-emitting diode package low power objective low power processor low power technology low-power telescope low-power theorem low pressure carburizing low pressure casing spray low pressure casting low pressure chemical vapor deposition low pressure chemical vapor deposition, LPCVD low pressure chemical vapour deposition low pressure cold plasmas low-pressure die casting low pressure gradient low-pressure gradient low pressure operation low-pressure physics low-pressurepipe irrigation low pressure plasma low-pressure plasma low pressure polyethylene low pressure sodium lamp low pressure sodium(vapour) lamp low pressure turbine

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