阿拉木图的山地曾经是城市的美丽背景，现在已经成了积聚空气污染的帮凶。
The city’s mountains, while providing a beautiful backdrop to the old capital, helped to trap pollution.
首次提出了空气质量环境背景值的确定等提高城市空气污染预报准确率的有效措施。
The effective measures that determined background value of urban air pollution and improved forecast accuracy was proposed.
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