It is an estimate of the mean of the population.

这是对人口平均数的一个估计。

youdao

I mean take the question of East Asia: Japan, Korea, China, etc. a third of the world's population lives there, now the largest economic region in the world.

我们来谈谈东亚的问题。东亚：日本，韩国，中国等等——世界上三分之一人口住在那边，现在是全球最大的经济区域。

youdao

The discovery of such a large gibbon population may mean the species has a better chance of long-term survival, the scientists say.

科学家表示，发现数量如此之多的长臂猿意味着这个种群有更好的机会长时间存活。

youdao

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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But there is also economic sense to it, as opening these top positions up to the other half of the population will mean an even more talented slate of candidates to choose from, making sure the best and brightest are better and brighter.

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In a meritocracy the Lords would increasingly come to represent a random sample of the population over the generations, as regression to the mean moves all to the average.

ECONOMIST: On R&D, hospital care, hemp, the House of Lords, AIPAC, Jean Baudrillard, Europe | The

Cholesterol UK said if that pattern was repeated among the UK population of 40 million adults, that would mean 12 million people did the same.

BBC: NEWS | Health | Cholesterol confusion revealed