导言部分对主要概念进行界定，说明本论文写作的意义和价值。
In "Introduction", the key concepts are defined and the significance as well as the value of this paper is illustrated.
引言部分主要交待了论文写作的意义和必要性以及论文范围的界定。
The part of the foreword has explained the meaning and necessity of the writing of the thesis and definition of the thesis's range mainly.
这一点，决定了本论文写作的学术意义。
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