Lets take a look at various pieces of Amazon's recommendation system to get an insight on how they work. Here are the sections that are shown in the main area of my Amazon account when I login.

让我们看看亚马逊推荐系统的各个模块，来了解他们到底是怎么工作的。

youdao

A good manager never lets his subordinates get away with saying "we tried this and that, but it did not work so I don't know what to do" because there is ALWAYS something that can be done.

一个好的经理从来不允许他的下属说“我们尝试过这样那样的方法，但都没有用，所以我也不知道怎样去做了”，因为总有事情可以做到。

youdao