例如：Things happened in the past, known as history, is great treasure for us human beings, through and only through studying the past can we gain valuable experience which serves as a means of guiding our development of the society.
History consists of the things happened in the past and it is a great treasure to human beings. Through and only through studying the past thoroughly can we gain valuable experience from history. The historical experience serves as a means of guidance for the new development in the society.
例如：For getting a satisfying score, students have to prepare for and review their texts frequently, remember all the knowledge they have learned deep in mind, enlarge their learning if it is possible and so on, especially when examinations are coming. All these efforts, no matter what their aims are, will surely lead to a corresponding paying back.
段中的这一句"no matter what their aims are"，在整个上下文表达上面没有任何实质性的意义，完完全全是句废话。