从某一层面来说，作为一个社会，我们长胖的原因并不神秘。
On one level, there is no mystery about why weas a society are fat.
从另一方面来说，美国和英国两国对于各方面的认知标准都处于相似的层面，孩子最终与自己的父母为同一雇主工作，这对于社会的流动性。
In the US and the UK on the other hand, where all the signs are that to a similar degree, children end up working for the same employer as their parents, the effect on social mobility is much greater.
从技术层面来说，这不算一大步；但从社会层面，这一步是巨大的。
Technologically, it's not a huge step, but, socially, it is huge.
从社会学层面看，社会阶层出现的变量来自于群体的流动人口，对于这样一座城市来说有两个部分，出走的和留守的人口。
From a sociological perspective, variables of social class emerge from the mobile population groups, which have two parts for such a city, the leaving and left-behind population.
从社会学层面看，社会阶层出现的变量来自于群体的流动人口，对于这样一座城市来说有两个部分，出走的和留守的人口。
From a sociological perspective, variables of social class emerge from the mobile population groups, which have two parts for such a city, the leaving and left-behind population.
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