what is smile???????
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A smile is formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy or amusement
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Explanation:
Smile is an expression of happiness made by turning your mouth up at the corners. An example of smile is the expression on your face when you are happy
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