So if you think about the way something like, say, Mapquest works, and last week in recitation you looked at the fact that shortest path is exponential.

所以如果你想想电子地图，还有上周学的列举法,你就会发现一般最简单的方法,都是指数递增的。

麻省理工公开课 - 计算机科学及编程导论课程节选

The S&P 500 is 500 companies, who are major companies, so these tend to be mature companies and they tend to be in the dividend-paying stage.

标准普尔500指数包括500家大公司,这些一般都是成熟期的公司,他们一般都处于需要支付股利的阶段

耶鲁公开课 - 金融市场课程节选