The transformation regularity of chemical pesticide in soil was analyzed. It was important to predict its change tendency and control pesticide environmental pollution.
阐述了化学农药在土壤中的迁移转化规律，对于预测其变化趋势和控制农药环境污染具有重大意义。
Through analysis of concentration change with time and space of mian air pollutants, some causes of the change regularity are expounded, being useful for pollution forecasting and control.
通过分析大气中主要污染物浓度的时空变化，阐明形成此规律的原因，对大气污染物的预测和防治具有一定意义。
The monitoring data in state controlling air sampling sites have been statistically treated to analyze pollution situation and regularity of NO2 and O3 in Nanjing Area.
根据南京市环境监测中心站大气国控点监测的空气质量数据，统计并分析了NO2和O3的污染变化特征及规律。
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