虽然医药科学已经延长了寿命，但对我们的生命期(人类生命可能达到的最长时间)几平很少或根本没有影响。
In fact, although medical science has extended life expectancy, it has had little or no effect on our life span (the maximum length of life possible in our species).
随着人的平均寿命的不断延长，在更年期的调整变化中，不少人的内在生理机能出现了复苏现象，从而开始生命过程的第二周期。
With the extension of the average life span, many people start their second life cycles, due to the recovery of physiological function.
提出了刀具全生命周期管理的概念，将刀具全寿命周期管理划分为计划期、投入期、使用期、报废期四个阶段。
The concept of cutting tool life-cycle management was put forward, and divided it into four phases: planning period, input time, serviceable life and discarding period.
提出了刀具全生命周期管理的概念，将刀具全寿命周期管理划分为计划期、投入期、使用期、报废期四个阶段。
The concept of cutting tool life-cycle management was put forward, and divided it into four phases: planning period, input time, serviceable life and discarding period.
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