It takes 'guts and smarts' to live to 100 and still feel well, says Dr. Walter Bortz, a scientific researcher, author, geriatrician and octogenarian marathon runner.
波茨（Walter Bortz）博士说，要活到100岁并且还保持健康，需要"胆子和脑子"。波茨是一位科学研究员、作家、老年病学家和跑马拉松的八旬老人。
By now most of us know what we should be doing to protect our health. And for a variety of reasons or excuses
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