SE robots follow standard links but not dynamic pages, those are generated from databases or content management systems, bcoz dynamic pages are not SE friendly!
Why do you say that they can not? Googlebot certainly reads many if not most dynamic URLs. I have hundreds of items in my database and all appear in webmastertools as individual pages. If the querystring contains just a few variables G seems to have no problem at all.
google can read dynamic urls, it just cannot sure the visitor will see same content as robots see, so its very difficult to index it.