英语翻译：这一年，我学到很多东西，很多在大学4年都学不到的东西

I had learnt a lot this year,of which I couldn't learn in colleges within that 4 years.

This year I've learnt a lot of stuff, stuff that I couldn't possibly learn during my four years of university.

During this year, I've learned many things, of which I couldn't learn in the four-year college life.

This year I've learnt a lot of things which I couldn't have learnt during my four years in college.

during this year, I've learned a lot,which I can't acquire in 4-year university study

I have learned much what cannot be learned in university.
我觉得四年好像没必要翻译了