The old dog lay on the porch and watched the world go by.
Meaning: This sentence describes a dog lying on a porch and observing the activities and changes happening around it.
Choice of Words: Porch is a covered area outside a building, usually at the front or back, where you can sit and relax. Watched means to look at something carefully and attentively. World means the whole earth, including all of the people and things on it. Go by means to move past something or someone.
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