研究:多微笑可以让你多活七年

        Experts studied 230 pictures of major league baseball players printed in the 1952 Baseball Register.

　　专家们从1952年的一些主要的棒球联盟中研究了230名注册棒球队员的照片。

　　The researchers ranked each player according to whether they had no smile at all, a partial smile, where only the muscles around the mouth were involved, or a full-blown smile that featured a toothy grin, raised cheeks and creases around the eyes. The researchers then compared the photos with the life span of each player.

　　专家们按队员们的笑容进行等级分类，分别是“一点都不笑”，“笑了一点儿”，“微笑时嘴部肌肉有抽动”或是“笑的合不拢嘴”，以及“扬起脸，眼睛都笑出了皱纹”等这几个分类。然后他们把这些照片与队员们的寿命进行了比较。