我認為可以把文獻探討的部分做得更加全面，讓閱讀者對於變項的定義更加清楚

我認為可以把文獻探討的部分做得更加全面，讓閱讀者對於變項的定義更加清楚與了解

結果 (英文) 1:

I think that the part of the literature discussion can be made more comprehensive, so that the reader can more clearly and understand the definition of variables

結果 (英文) 2:

I think we can make the parts of the literature more comprehensive and make the definition of variables clearer and clearer to readers

結果 (英文) 3:

I think we can make the part of literature discussion more comprehensive, so that readers can have a clearer and better understanding of the definition of variables