And that's because it's easier to test small things than big things. And it's easier to debug small things than big things.

这是因为对小一点的对象,进行测试比对大一点的对象进行测,试要简单多了，调试也是如此。

麻省理工公开课 - 计算机科学及编程导论课程节选

But you can imagine the inability to do that in a big population study with thousands and thousands of subjects, so we have to rely on data like this.

但你们可以想象在一个大样本研究中,不可能对数以千计的研究对象做这种培训,所以我们需要依靠像这样的数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选