利用数值模拟方法，研究了单个建筑物外存在点污染源时室外空气污染对室内空气质量的影响。
The impact of outdoor air pollution on the indoor air quality by the way of numerical simulation was studied.
水污染物分为点源和非点源，前者认为所有干燥空气污染物通过水管或管道进入水道。
Water pollutants are categorized as point source or nonpoint source, the former being identified as all dry weather pollutants that enter watercourses through pipes or channels.
水污染物分为点源和非点源，前者认为所有干燥空气污染物通过水管或管道进入水道。
Water pollutants are categorized as point source or nonpoint source, the former being identified as all dry weather pollutants that enter watercourses through pipes or channels.
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