警告信的签署者中有鲍勃·约翰逊，他是“生态足迹”概念的发起人，此概念衡量的是维持一个特定生活方式所需的环境投入总量。
Among the signatories of the warning was Bob Johnson, the originator of the "ecological footprint" concept, which measures the total amount of environmental input needed to maintain a given lifestyle.
随着河流和泉水的耗尽，印度越来越依赖地下水维持生活所需；
As rivers and springs are depleted, Indians increasingly rely on groundwater for their household needs;
如果你住在公寓或者高层建筑，可与大厦的经理交谈，找到大楼中最为安全的地方以进行躲避，并且要求给大楼内的居住者提供可以维持到可以安全出去时的生活所需。
If you live in an apartment building or high-rise, talk to the manager about the safest place in the building for sheltering and about providing for building occupants until it is safe to go out.
选择健康的食物，并且卡路里总数不应该超过维持日常生活所需要的量。
The foods selected should be healthy and the total amount of calories should not exceed the amount needed to maintain or lose weight.
{3}该快乐指数综合考虑了人们的生活满意度、平均寿命以及对环境的影响(主要通过衡量维持居民生存以及提供足够能源消耗所需的土地数量来了解)等多项指标。
The index combines life satisfaction, life expectancy and environmental footprint — the amount of land required to sustain the population and absorb its energy consumption.
“大部分生活所需都靠我们的枪来获得。” （丹尼尔·狄佛）。但它也常常表示勉强足够维持生活的资源。
"The principal part of our subsistence was to be had by our guns" (Daniel Defoe). Very often, however, it suggests resources barely sufficient to support life.
廉价工资只包含维持劳动力自身生存所需要的生活资料价值，不含赡养家属及教育培训费用。
Low salary covers only the value of the basic necessities while the expenses for raising a family and education are excluded.
{3}该快乐指数综合考虑了人们的生活满意度、平均寿命以及对环境的影响（主要通过衡量维持居民生存以及提供足够能源消耗所需的土地数量来了解）等多项指标。
Thee index combines life satisfaction, life expectancy and environmental footprint — the amount of land required to sustain the population and absorb its energy consumption.
{3}该快乐指数综合考虑了人们的生活满意度、平均寿命以及对环境的影响（主要通过衡量维持居民生存以及提供足够能源消耗所需的土地数量来了解）等多项指标。
Thee index combines life satisfaction, life expectancy and environmental footprint — the amount of land required to sustain the population and absorb its energy consumption.
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