The interstellar material, rather like terrestrial clouds, comes in all shapes and sizes.

星际物质很像地球上的云，形状大小各异。

youdao

Lie on your backs and find shapes in the clouds.

背靠背的躺在一起，观察云的形状。

youdao

In the distance the hills were covered with clouds of delight, full of light, and as you watched them they were taking different shapes.

远处的群山覆盖着通体发亮的快乐云朵，而当你看着它们的时候，它们变幻出不同的形状。

youdao

It began to form shapes. I could see clouds and wonderful trees and flowers.

VOA: special.2009.07.25

Clouds are entities that, from the ground, may have distinct shapes and sizes, but are internally ill-defined and blurry anomalies.

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Remember when you were a kid and it's a cloudy day and you lie back in the grass and watch the clouds passing by and changing form and you're trying to see if they're characters or animals or other shapes?

FORBES: Magazine Article