随着年龄的增长，皮肤的保护性反应——表层血管的收缩减慢，对低温的反应可以增加代谢率，可老年人的代谢率却在不断减弱，哪一代谢机体的下降却不明。
The skin's protective reaction of constricting surface blood vessels is slower with age, and the cold-induced rise in metabolic rate is also weakened in older people, but the mechanism is unknown.
电子游戏设计师、美国卡内基·梅隆大学研究人员杰西· 谢尔如是说，他和一群游戏设计师以及心理学家坚信，使公民更健康、提高工作效率、更有事可做的关键是将游戏引入生活。
He and a bevy of game designers and psychologists are convinced that the key to a society of healthier, more productive and more engaged citizens lies in bringing gaming into daily life.
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