英語長文・和訳問題トレーニング 140016（さくら教育研究所）

　The smile may no longer be an effective way to mask one's true feelings.   Some psychologists have claimed that true smiles and false smiles use different muscles.  For example, in the true smile, the muscles surrounding the eyes tighten, while the cheek muscles pull the corners of the lips upward.  On the other hand, in the false smile, the muscles between the eyebrows move slightly, while the muscles around the mouth pull the corners of the lips downward.  If the psychologists' claim is proven to be true, perhaps people will worry less about what they say and more about which muscles to use when they smile.