研究:多微笑可以讓你多活七年

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

　　專家們從1952年的一些主要的棒球聯(lián)盟中研究了230名注冊棒球隊(duì)員的照片。

　　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.

　　專家們按隊(duì)員們的笑容進(jìn)行等級(jí)分類，分別是“一點(diǎn)都不笑”，“笑了一點(diǎn)兒”，“微笑時(shí)嘴部肌肉有抽動(dòng)”或是“笑的合不攏嘴”，以及“揚(yáng)起臉，眼睛都笑出了皺紋”等這幾個(gè)分類。然后他們把這些照片與隊(duì)員們的壽命進(jìn)行了比較。