It was a lovely afternoon with a blue sky and a few fleecy white clouds.

那是个美丽的下午，蓝蓝的天空中飘着几朵轻软的白云。

《柯林斯英汉双解大词典》

In sharp contrast to her mood, the clouds were breaking up to reveal a blue sky.

乌云渐渐散开，露出了蓝天，这和她的情绪形成了鲜明的对照。

《牛津词典》

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

While there, Lamb helped Hunt paint the ceiling of his cell sky blue with white clouds.

NPR: Part One

She found that a simple, ten-minute imagery task (such as picturing clouds in a bright blue sky or a cheery stack of watermelons in a pickup truck) can turn brooding into focused action.

CNN: What really makes people happy

White trade-wind clouds drifted across the blue sky.

CNN: The Kon-Tiki: Crossing an ocean on balsa