提示环境极低频电磁场暴露与肿瘤的危险度，以及其他非肿瘤性健康效应之间的相关性是很微弱的，甚至是不确定的。
The results show that the association between ELF electromagnetic fields and the risk of tumors as well as non-tumor health effects is very weak even uncertain.
颗粒物浓度监测不仅是评价城市空气质量的基础，而且是进行城市污染控制与环境健康效应评估的重要依据。
Monitoring of particulate matter concentration is the basis for urban air quality evaluation and pollution control, and also very important for health effects assessment.
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