They can be on store shelves for a long period of time, and that has to do with the economics of food, especially food available to the poor, which we'll discuss later.

因此可以在商品货架上销售很长一段时间,这也与食物的经济学价值有关,特别这类食物穷人也买得起,这个我们以后会讨论

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In this experiment, if you are in my magnet, you might see this first, a product, and then see it's in an associated price, and then be given the opportunity to either buy that product at that price or not.

在这个试验中，如果你是我的试验对象，你会首先看到这个，一种商品，然后会看到相关的价格，然后做出选择,决定是否要购买图像上的商品。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选