Sweet potatoes are a good source of potassium.

Meaning: Sweet potatoes contain a lot of potassium, which is a mineral that is important for your health.

Choice of Words: Sweet potatoes are a type of vegetable that is popular in many parts of the world. Good means satisfactory or acceptable. Source means a place, person, or thing from which something comes or can be obtained. Potassium is a mineral that is important for many bodily functions.

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