Here's my last slide The National Association of Homebuilders surveys its membership to ask them what is the traffic of homebuyers?

最后一张幻灯片,全美房屋建造协会调查了它的成员,询问他们购房者参观量的情况

耶鲁公开课 - 金融市场课程节选

So they kept track of country-by-country, when cases of smallpox occurred, and as it was eliminated from regions of the country, they then certified those regions to be smallpox free.

它跟踪调查了一个又一个国家,记录天花在这个国家中何时发生,又是何时清除的,并确证这个区域已经没有天花

耶鲁公开课 - 生物医学工程探索课程节选

It represents the moment in the life of Socrates where he turns away from the investigation of natural phenomena to the study of the human and political things the moral and political things.

它代表着苏格拉底生命中,从调查自然现象,转向研究,人类与政治事务,即道德与政治事务。

耶鲁公开课 - 政治哲学导论课程节选

And the other thing you can do is take self reports like the ones you're doing, hopefully do enough of them, and a random enough sample of the population, that you can extrapolate from that sample to the whole population, and try to estimate what people are eating in that way.

还有其他可以做的,比如大家正在做的这种个体调查,希望能把它做的充分些,如果有充足的随机样本,就可以从样本推断出,整个总体,从而推断哪类人有这样的饮食习惯

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选