Homo sapiens is always, and in the same measure, homo socius.
智人」在同等尺度上总是「社会人」。
But I can't say it is unique, because it exists elsewhere too, although perhaps not in the same measure.
但是我不敢说它是独特的,因为其他国家也有,虽然或许程度不同。
Or, they might be asked the same question in three different ways to measure the consistency of their answers.
或者,他们会被用三种不同的方式提问同一个问题,以此来衡量她的答案的一致性。
Well, a cross-sectional study would mean that you'd get a random group of the population and measure them in 1970 and then take another random group five years later and measure them, but it wouldn't be the same people necessarily, it would be different groups of people.
那么,横断面研究就是,1970年你在人群中随意选择一组人,并记录下相关数据,然后,五年后再随意选择一组人记录数据,但这不需要是同一组人,通常是不同的人
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