21）This paper offers the latest information regarding……
22）This paper is devoted to examining the role of……
23）This article explores……
24）This paper expresses views on……
25）This paper reflects the state of the art in……
26）This paper explains the procedures for……
27）This paper develops the theory of ……
28）This article reviews the techniques used in……
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30）This article is about……
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34）This article tells of……
35）This paper tries to describe……
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37）This paper reports the latest information on ……
38）The author of this article reviews……
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40）The writer of this eassy tries to explore……
41）The aim of this paper is to determine……
42）The purpose of this article is to review……
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