The grey system assessment method, air pollution integrated index are applied to evaluate the atmosphere, surface water, noise environmental quality of valley cities in western China.

本文首先采用灰色系统评价方法、空气污染综合指数等方法对中国西部河谷型城市大气、地表水、噪声环境质量进行了客观评价。

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A grey miasma, neither cloud nor mist low in the sky and the atmosphere was stifling.

一些似云非云，似雾非雾的灰气低低的浮在空中，使人觉得憋气。

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Improve the season tendency model by using the grey system modern and predicate the future yearly figure of the dioxide of the atmosphere about the system environment.

利用灰色系统模型改进季节性趋向模型，预测城市环境空气中二氧化硫的未来年度值。

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But in the short run her unpompous, down-to-earth, jargon-free directness should bring a gust of fresh air to the stale, grey-suited, male-dominated, wheeler-dealing atmosphere of German politics.

ECONOMIST: Angela Merkel, Germany��s new-look conservative