There's a famous Harvard Business School study on a woman named Heidi Roizen.

哈佛商学院的一个著名研究是有关于一位叫海蒂·罗森的女性。

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Floss your teeth The gerontologist Dr Michael Roizen claims that flossing your teeth every day can add six years to your life.

用牙线清洁牙齿。 老年医学家迈克尔罗伊森博士称每天用牙线清洁牙齿能多活6年。

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In 2002 — not so long ago — a professor who was then at Columbia University took that case and made it Howard Roizen. And he gave the case out, both of them, to two groups of students.

在2002年——就是不久前——当时在哥伦比亚大学的一位教授接了这个案例，把它改成霍华德·罗森。

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And so did 50 other big-shot Silicon Valley types, including Napster cofounder Sean Parker and venture capitalist Heidi Roizen.

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