Dr David Wikenheiser has been studying ageing in Vancouver, Canada, for the past 10 years and has found the average person is 15 or more years older biologically than chronologically.
大卫·威肯海泽博士在加拿大温哥华研究衰老问题已有10年时间，他发现一般人的生物学年龄比按时间计的实际年龄要老15年甚至更多。
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