Sunlight streamed through the clouds.
Meaning: The light from the sun moved in a continuous line through the puffy things in the sky.
Choice of Words: Sunlight is the light from the sun. Streamed means it flowed or moved in a continuous line. Through shows the path the sunlight took. The is used before a noun to show that we're talking about a specific thing. Clouds are the puffy things in the sky.
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Related Expressions