上述原因，是笔者选择此命题的动机。
The above reason is the writer's motive to choose this subject.
这是激发笔者选择“金融控股公司”作为论文研究对象的主要原因。
This is the main reason why I choose "financial holding company" as my thesis subject.
这便是笔者选择研讨公务员职位分类轨制作为论文课题的目的所在。
This is why the author chooses the study on the position classification of civil servant as the research subject of this thesis.
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