Their colour variations are probably due to differences in temperature and in the size of water droplets that make up the clouds.

它颜色的变化很可能是由于温度不同和组成云层的水滴大小有差异的缘故。

youdao

And beyond all this, miles away, was the sea, and beyond the sea the sky, full of clouds which were just turning rose colour with the reflection of the sunset.

那边几英里以外是大海，大海以外是天空，落日映照下满是玫瑰色的云层。

youdao

Sunshine changes colour as it goes through the drops of water in the clouds.

当阳光脱过云中的水滴是窜改了色彩。

youdao

He could detect shallower water by colour, and see the light of invisible lagoons reflected in the undersides of clouds.

ECONOMIST: Mau Piailug