After about 40 minutes of shopping, most people stop struggling to be rationally selective, and instead begin shopping emotionally—which is the point at which we accumulate the 50 percent of stuff in our cart that we never intended buying.

首先，按照我们之前给大家讲解的步骤，我们首先需要断句。这个句子大家拿到之后发现有些长，所以大家势必是需要断句的。在这里我们把它断成四部分①After about 40 minutes of shopping ②most people stop struggling to be rationally selective, and instead begin shopping emotionally③which is the point at which we accumulate the 50 percent of stuff in our cart④that we never intended buying。

然后我们可以开始抓主干，识修饰了，要想快速的抓到主干，我们先把从句识别出来。首先第一个从句：After about 40 minutes of shopping，这是一个时间状语从句。第二个从句：which is the point ，这是一个定语从句修饰整个句子。第三个从句：at which we accumulate the 50 percent of stuff in our cart，这同样是一个定语从句，修饰point。第四个从句：that we never intended buying，这是一个定语从句，修饰stuff。抓出从句之后，我们就找到了句子的主干：most people stop struggling to be rationally selective, and instead begin shopping emotionally，就是简单的主谓宾，只不过这里是两个谓宾结构进行并列。

最后我们可以开始理解整个句子翻译了：购物约 40 分钟后，大多数人就不再费心去理性选购，而是开始冲动购物了，就是从这一刻起，我们把本来根本没打算买的那一半东西堆进了购物车。