这篇文章指出Facebook从人口统计的角度定位目标客户为64岁，超过64岁你就成为历史了。

This article points out that Facebook's demographic targeting ends at 64 years old - after that you are history.

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这对于富裕国家的标准来说不算太差，但总趋势是下降的，一旦下降加剧，由于人口统计的拖累，日本国内生产总值将出现负增长。

That is not too bad by rich-world standards, but the trend is downwards, and if it drops much further GDP will turn negative because of the country’s demographic drag.

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具有相似人口统计学特征的消费者之间存在实质性差异。

There are substantial differences among consumers with similar demographic characteristics.

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No. 2, we believe that young people have to be a key part of building that ethos One of the reasons for that is purely demographic.

其次，我们认为青年人,必须成为建立该社会风气的主力,其中的一个原因,纯粹是从人口统计学来考虑的。

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Most censuses were taken, by the way, as a way of counting heads, the number of people who had to be fed at the time of a siege.

顺便提一下,大多数人口普查,都采用数人头的方法,即在围城期间统计需要给养多少人口

耶鲁公开课 - 欧洲文明课程节选