空气清新，天空碧蓝。

The air was crisp and clear and the sky was blue.

《牛津词典》

我对衢州的印象和我一直以来想的一样：绿色的乡村，阴雨的天空，潮湿的空气。

My impressions of Quzhou city were as I always thought: green countryside, rainy sky, wet air.

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由于九月有晴朗的天空和新鲜的空气，这是一个很好的爬山时间。

As September has the clear sky and fresh air, it is a very good time to climb the mountain.

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