Spinach is a good source of potassium.
Meaning: Spinach contains a lot of potassium, which is a mineral that is important for your health.
Choice of Words: Spinach is 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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