寿命；存在期；使用期；有效期；

1. lifespan的意思

1. 寿命：现代肝移植确立了新的目标:就是使晚期肝病患者重新获得正常的生命时限(寿命)(lifespan)和正常的生活质量(qualityoflife). 而且后者(生活质量)得到了更为广泛的重视,很多新的观念被列如了肝移植的指正,比如全身搔痒和乏力,

2.

2. 生命值：Life寿命 | Lifespan生命值 | Lifespan value Queue生命值列表

3. 生活年限：life history 生活史 | lifespan 生活年限 | lifetime 寿命

4. (生命期)：Constant(恒量) | Lifespan(生命期) | fractal(不规则碎片)

1. the period during which something is functional (as between birth and death)

    e.g. the battery had a short life
           he lived a long and happy life

    Synonym: lifelifetimelife-time