我们用以了解人群的很多信息来源都存在偏见，比如媒体呈现不同人群的方式存在偏差。

A lot of the information we get about human groups is through biased sources like how they're represented in the media.

youdao

杜·波依斯担心，种族会被用来作为生物学层面上的一种解释，并用以说明他所理解的不同人群之间的社会和文化差异。

Du Bois was concerned that race was being used as a biological explanation for what he understood to be social and cultural differences between different populations of people.

youdao

为什么不同人群之间会有智力差异？

Why do different human groups differ in intelligence?

youdao

So if you think of the effect of technology on the different populations, the young-age and the adult-age learners.

所以在思考技术对,不同人群的影响时，要想到青年和成年学者。

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You want to give it to people in different communities, to make sure that it works in all the subpopulations where the vaccine's potentially valuable.

研究者希望将疫苗分接种于不同人群,以确保疫苗适用于所有人,这样才能体现疫苗的价值

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But it's all different degrees of terrible, if you will, because so many people in the population share that biological vulnerability and when the environment changes, we have the problems.

只要愿意,这造成的恐慌程度是不同的,因为在人群中有很多这样的群体,他们都有这种生物易损性,当环境发生变化时,就会出现问题

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