To fly, of course, is the fastest way, but you can't see anything during your stay in the air but the blue sky and white clouds.

飞行，当然，是最快的方式，但是在你停留在空中的时候，你看不到任何东西，除了蓝天和白云。

youdao

From the top, you will see the white sails of passing boats under the blue sky.

站在山顶，你会看到蓝天下过往船只的白帆。

youdao

Augustine says, the sky, when you look up at the sky you see that blue thing, that big blue dome that's above you.

奥古斯汀认为，天空，当你抬头看天空你看到那个蓝色的东西，那个你头上的蓝色大圆顶。

youdao

This was because all you could see was the very blue sky and the very hot sun.

VOA: special.2009.01.14

But there was a band of blue sky just above the gray, the blue you see in tropical postcards, the blue of the Mediterranean.

NEWYORKER: Beginners