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。

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。

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。

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。