You use dedicated to describe someone who enjoys a particular activity very much and spends a lot of time doing it.
Her great-grandfather had clearly been a dedicated and stoical traveller.
她的曾祖父显然曾是一个非常投入且坚忍的旅行者。
If you say that someone is dedicated to something, you approve of the fact that they have decided to give a lot of time and effort to it because they think that it is important.
He's quite dedicated to his students.
他对学生们很上心。
You use dedicated to describe something that is made, built, or designed for one particular purpose or thing.
Such areas should also be served by dedicated cycle routes.
这些区域也应该设自行车专用车道。
the world's first museum dedicated to ecology.
世界上第一家专门的生态博物馆。