使用这些对你有用的类别，只要努力尝试使用别人对它们的归类，那么以前你喜欢的东西就不再对你有任何意义。

Use groupings that make sense to you; if you try too hard to use what someone else thinks should be grouped together, it will have no meaning for you.

youdao

一方面，我们有这样的例子，有的公司拥有两种，不同类别的股票，他们在经济意义上是相同的。

On one level, there are things like companies that have two. Different classes of stock that are economically identical.

youdao

例如，尽管获得客户所在的城市的列表是有意义的，但是市场营销部门更希望知道哪些类别的产品最畅销。

For example, while having the list of cities where customers reside is useful, the Marketing Department might be more interested in which product categories are active.

youdao

On one level, there are things like companies that have two . different classes of stock that are economically identical.

一方面，我们有这样的例子，有的公司拥有两种,不同类别的股票，他们在经济意义上是相同的。

耶鲁公开课 - 金融市场课程节选