有人可以向我解释一下普通网络服务中使用的亚马逊网络服务组件是什么吗？

The web service that I want to run on AWS has to store and retrieve user data, present it to the user via a website, and needs to be able to parse the sitemaps of a few thousand sites every 10 min or so. Which components of AWS, such as S3, EC2, and CloudFront do I need to use. A short synopsis about the purpose of each component would be nice. :)The web service that I want to run on AWS has t