A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. It is believed it takes about 42 muscles to smile

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Reading  is a complex " cognitive process " of decoding  symbols  in order to construct or derive meaning ( reading comprehension ). Reading is a means of  language acquisition , communication, and of sharing  information  and ideas. Like all languages, it is a complex interaction between the text and the reader which is shaped by the reader’s prior knowledge, experiences, attitude, and language community which is culturally and socially situated.
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