目的：研究颗粒物空气污染与居民每日死亡率暴露-反应关系，为环境决策提供科学依据。

Objective: to further study concentration-response relationship between daily mortality and particulate air pollution, to provide scientific basis for making policy.

youdao

目的：研究颗粒物空气污染与居民每日死亡率暴露-反应关系，为环境决策提供科学依据。

Objective: to further study concentration-response relationship between daily mortality and particulate air pollution, to provide scientific basis for making policy.

youdao