未出生的胎儿也受到空气污染的威胁。多项研究表明，长期处于颗粒物浓度较高的环境中会提高流产、早产和生育率下降的几率。
Unborn children are also at risk. Studies show chronic exposure to high levels of particulate matter is associated with high rates of fetal loss, premature births and lower birthrates.
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.
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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