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