简单来说，调查会假定在你面前有一个“生活阶梯”（Ladder of life），从低到高是0到10级，最高一级代表着你认为你可以得到的最美好生活，最低一级则是最悲惨的生活。
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In understanding cognitive ability, we must not elevate discrimination to a science; allowing people to climb the ladder of life only as far as their cells might suggest.
在理解认知能力的时候，我们不能把辨别力拔高为一门科学；而是让人们只能在细胞暗示的能力范围内攀登生命的阶梯。
Each time you improve something on that ladder, you improve your "chances" of getting what you want, because you know, everything in life is about chance.
每次你在那个层次提高一点点，你就增加了得到你渴望的东西的几率，因为你知道，生活中的每一件事都和机会有关。
Recent studies suggest, though, that countries with higher GDP per person do tend to have higher ladder-of-life scores.
尽管最近的研究显示，人均GDP较高的国家生命阶梯分值一般较高。
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