The sun shone on for hours in a cloudless sky.

天放晴了几个小时。

The sky is quite blue and cloudless.

蔚蓝天空晴。

It was the first of August, a perfect day, with a burning sun and cloudless sky.

八月一日这天, 阳光普照, 万里。

The sky was bright and cloudless overhead, and the tops of the trees shone rosily in the sun.

头上大空晴，林梢在晨光下泛着一抹玫瑰红。