Without regular top-ups, our body's survival time is limited to a matter of days.

如果没有定期的补充水，我们只能存活几天。

The median survival time of these successes has so far been 16.8 months, quite a gain over the nine months that might have been expected for such people just a few years ago.

目前存活时间的中位数为16.8个月，这要比前些年对这类病人存活期的预期增加了9个月，已经算相当长了。

Various interventions, such as infection-fighting drugs, can increase a population's average survival time, but only approaches that slow the body's rate of aging will increase the maximum lifespan.

有很多种外在作用（如注射抗感染药物）都可以提高人群的平 均生存时间，但是只有能够降低人体衰老速度的方式才能够提高最大寿命值。

A statistical analysis of the data yielded an estimate for the likely survival time of a typical colony of between 12.9 and 15.3 years, and suggested that warm and dry conditions were more favourable for survival than cold, wet ones.

数据统计分析估测了一个典型的聚居群（12.9—15.3年）可能的生存时间。该分析也表明，比起寒冷潮湿的条件，温暖干燥的环境更有利于生存。