Ants marched fast in long line.
Meaning: This sentence is describing the ants marching in a long line.
Choice of Words: Ants are small insects that live in colonies. Marched means to walk with a regular and steady pace. Fast means at a high speed. Long means having a great length. Line is a row of people or things. Together, we have "Ants marched fast in long line," which means that the small insects that live in colonies walked with a regular and steady pace at a high speed in a row that has a great length.
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