Source of calcium and protein.

Meaning: This sentence emphasizes the presence of both calcium and protein in milk, making it a valuable source of these essential nutrients.

Choice of Words: Source means a place, person, or thing from which something comes or can be obtained. Of means belonging to or associated with something. Calcium is a mineral that is essential for strong bones and teeth. Protein is a nutrient that is essential for building and repairing tissues. When combined, "Source of calcium and protein" means that milk provides both calcium and protein.

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Related Expressions