Grace Miller and Theresa Vincent staff the PBX, or private-branch exchange, switchboard at the Southern California Air Pollution District office in 1959.

1959年，南加利福尼亚空气污染地区办公室专用分组交换机的接线员格雷斯·米勒（Grace Miller）和特瑞莎·文森特（Theresa Vincent）位于接线总机旁边。

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The model was applied to Hanyang District, Wuhan to study urban non-point source pollution control technology, and satisfactory results were achieved.

所建模型已成功地应用于武汉市汉阳地区城市面源污染控制技术研究，获得了满意的结果。

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Only the change of energy structure, the good use of natural gas liquidized gas and water power and the reduction of coal with the content of s can we prevent acid rain pollution in Wanzhou District.

只有改变能源的结构组成，充分利用天然气资源、液化石油气、水电资源，减少含s煤的使用，才能消除酸雨对万州区的污染。

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Air in San Diego County remains unhealthy, especially in Oceanside and Chula Vista, said Bill Brick, senior meteorologist for the Air Pollution Control District.

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Because of the smoke, ash and winds, people in affected areas were urged to be cautious and to avoid unnecessary outdoor activities, the Ventura County Air Pollution Control District said.

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District Circuit Appeals Court-rejected Cross-State Air Pollution Rule and the Mercury Air Toxics Standard, are heavily premised upon condemnation of PM2.5 as a killer.

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