Modified the old text and added crosslink

src/content/language/records.md

@@ -124,11 +124,11 @@ check out the page on [Patterns][pattern].
 
 ## Record types
 
-Records are structurally typed based on the types of their fields. 
-A record's shape (the set of its fields, 
-the fields' types, and their names, if any) uniquely determines the type of a record.
-While you cannot declare a unique type for a specific record shape, 
-you can use `typedef` to give a name to a record type for better readability and reusability..
+Records in Dart are structurally typed based on their fields' types, names, and count. 
+While you can't declare a unique type for a record shape, you can use `typedef` for readability and reuse. 
+Learn more in the [Records and typedefs](https://dart.dev/language/records#records-and-typedefs) 
+section of the Dart language documentation.
+
 
 For example, you can define a named record type for a user profile: