生命曲线呈反对角线性上升，达到生理寿命前很少有个体死亡。
Its life is against diagonal, there was little death before its natural life.
结果预示，尽管男性平均期望寿命低于女性，但并不表明男性的生理寿命低于女性。
The results imply that although male average life expectancy is shorter than that of female, genetic life span of male is not shorter than that of female.
不过，有些物种可以通过特殊的途径—改变行为模式或生理过程，使自己的寿命突破体形的约束。
However, some species can take special steps, either by changing their behaviour or physiology to grow older than they might otherwise.
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