ASP.NET MVC：什么是Action方法？行动结果？它们有什么关系？

I'm sorry to ask such a basic question, but it's kind of fundamental for me. To better understand filters, I need to understand this notions. Although I'm on ASP.NET MVC for few months now and now are doing nice demos, I'm more familiar with Action method concept than action result. I'm sorry to ask such a basic question, but it'