It is found that air pollutants are easily confluent and accumulated when the weather in Beijing is controlled by the low-pressure type at surface.
发现当低压类地面天气形势控制时，容易引起污染物在北京地区的汇聚和累积。
It is found that air pollutants are easily confluent and accumulated when the weather in Beijing is controlled by the low-pressure type at surface.
发现当低压类地面天气形势控制时，容易引起污染物在北京地区的汇聚和累积。
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