Cold clouds like this are actually quite stable.

像这样的冰冷云朵其实很稳定。

These crystals grow from water particles in cold clouds.

这些冰结晶来自冷云团的水粒子。

But all I can say is, it's like, you know, lying on a cold cloud.

但我能说的是，这就像，你知道，躺在一片冰冷的云上。

The cold clouds hastened on in a body, as if painted on a moving slide.

一朵朵冷云聚集在一起，像是印在幻灯片上，匆匆而过。

These crystals grow from water droplets in cold clouds. They usually grow around dust particles.

这些晶体是从冷云中的水滴中生长出来的。 它们通常生长在灰尘颗粒周围。

Margaret felt as if a thin cold cloud had come between her and the sun.

玛格丽特觉得自己和太阳之间好像隔着一层薄薄的冷云。

Dust particles, especially if coated by pollution, act as condensation nuclei for warm cloud formation and as efficient ice nuclei agents for cold cloud generation.

尘埃颗粒，尤其是被污染覆盖的尘埃颗粒， 充当暖云形成的凝结核和冷云生成的有效冰核剂。