什么都是可以google 到的。这个时候不会google是不是有点过时了。我帮你找的link，你自己看

https://csadvising.seas.harvard.edu/concentration/requirements/?_gl=1*1d4gj8w*_ga*NjYyMjQyNjkwLjE3MTA5ODM4MjM.*_ga_FNNHYP076Y*MTcxMDk4MzgyMi4xLjAuMTcxMDk4MzgyMi4wLjAuMA..*_ga_Q97GE6JKJ9*MTcxMDk4MzgyMi4xLjAuMTcxMDk4MzgyMi4wLjAuMA..