It's tricky, but not impossible, to create an easy-to-use UI that would let you mark bits of a web page, and have those turn into the titles and items of an RSS feed.

这听起来很不切实际，但并不是不可能。创造一个简单易用的界面，让你能够在网页上做出标记，然后让这些标记成为RSS feed的标题或内容。