一般认为死于哮喘，心脏病和其它疾病的人数增加与灰色空气中的主要成分颗粒污染物有关。
Particulate pollution, a major ingredient of hazy skies, has been linked to higher death rates from asthma, heart disease, and other ailments.
空气凉爽，充满了鸟儿的啁啾声，山顶上灰色的天空发出粉色的光亮。
The air was cool, and filled with the twittering of birds. Above the mountains the pale sky shone pink.
秋季的空气是清新的，有着棕色、金色、灰色等鲜明的色彩。
The fall air is clear, and the colors are sharp, shades of brown, gold, and grey.
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