衰老的速率存在着个体差异。一般说来,生物学年龄(生物龄),并不等于日历年龄(日历龄),前者代表衰老的程度,后者仅仅是生命所经历过的时间,单位时间内生物龄的增长量就是个体在该年龄时的衰老速率。这个速率决定于遗传和环境两方面的因素。寿命的长短不仅决定于衰老速率,还决定于其它因素(如疾病)。不少疾病不是通过加速衰老来影响寿命,而是直接导致死亡,如“心脏猝死”,因此不能以其短寿而判定其为早衰。寿命之短长与衰老之快慢不 There are individual differences in the rate of aging. In general, the biological age (biological age) does not equal the calendar age (calendar age). The former represents the degree of aging, while the latter is only the time experienced by life. Aging rate at this age. This rate depends on both genetic and environmental factors. The length of life depends not only on the rate of aging, but also on other factors (such as disease). Many diseases do not affect life by accelerating aging, but directly lead to death, such as “sudden cardiac death,” and therefore can not be judged as premature aging by its short-lived. The short life span and the slowness of aging are not