There are two aspects of it. Thus far, the problem sets have mostly focused on function.

关于这个问题有两个方面，迄今，问题集只关注了方法。

麻省理工公开课 - 计算机科学及编程导论课程节选

I want now to carry that forward into something a little bit more focused on the portfolio problem.

现在从这个基础上拓展一下,更侧重于投资组合方面的问题。

耶鲁公开课 - 金融市场课程节选