Neuroscientist Emily Rogalski leads the Super Aging study at Chicago's Northwestern University.

神经科学家艾米莉·罗卡斯基在芝加哥西北大学领导这个超级老人研究项目。

Rogalski says they are, for the most part, known for their optimism, resilience and perseverance.

罗加尔斯基说，他们大多乐观、坚韧、有毅力。

Solving this mystery, Rogalski says, may help those who suffer from brain diseases such as Alzheimer's.

罗加尔斯基说，解开这个谜团或将帮助那些患有阿尔茨海默氏症等脑部疾病的患者。

As lead investigator of the study, Rogalski jokingly said that super-agers do not grow on trees -- meaning they are special and few.

作为这项研究的首席研究员，罗加尔斯基开玩笑说，超级老人并非随处可见，这意味着他们很特别也很稀少。