The blue of the sky的意思|示意

The number of official “blue sky days” is on the rise, and the ubiquitous whiff of coal smoke is now rare.

官方统计的“蓝天日”的数量在上升，以前随处可见的袅袅炊烟现在变得罕见了。

A clear atmosphere intensifies the blue of the sky.

纯净的空气使天空变得更蓝。

In some of the pictures, the tops of the nearby Woolworth Building and other skyscrapers can just be seen above the enormous cloud of debris, gray against a clear blue sky.

在这些照惩中，这伍尔沃斯大楼的顶部和其它的摩天大楼仅仅看到巨大的瓦砾堆上的烟，灰色笼罩了明净的蓝天。

Between the blossoming branches of the canopy bits of blue sky looked down like wonderful eyes.

在花枝茂盛的树冠间，一点点蔚蓝的天空像美丽的眼睛向下俯视着。

On the first morning, the sky was a Mosaic of blue and white.

第一天早晨，天空像一幅蓝白镶嵌的图画。

That's because the ambient light (in this case the blue sky) gets bounced of pretty much everywhere specially the Shadows.

那是因为环境光(蓝色的天光)被更多的反弹，尤其在阴影的部分。