That's so basic, it must have happened a million times and that's the basic idea of the stock market.

这是很基础的概念,早已屡见不鲜,而这就是股票市场的最初思想

耶鲁公开课 - 金融市场课程节选

Let's assume that you've won the lottery, and have serious money that you foolishly wish to invest in the stock market There are two basic strategies to choose from in investing.

让我们假设你赢了彩票，然后又一大笔钱,而你很傻的想要投资到股票中去,有两个投资策略,可以选择。

麻省理工公开课 - 计算机科学及编程导论课程节选

I want to talk about the stock market today and I thought I would keep it more or less basic because I think-- I want to emphasize basic concepts.

今天我想讲一些股票市场的内容,我想多讲些基础的内容,因为我认为基本概念很重要

耶鲁公开课 - 金融市场课程节选