The community of scholars has rules that govern how dissertations, theses and other academic papers are composed and formatted. Academic convention has established what is acceptable and what is not.
The ideal voice for a paper: third-person and active 论文的理想语气：「第三人称」与「主动」
Having resolved to write purposefully and to employ a writing style that emphasizes clear and vital language, the author of an academic paper next must address the mechanics of the language. One of these issues is choosing the appropriate “voice” to communicate the substance of the paper. This is essential. Finding its “voice” is central to a paper's function and effectiveness.
A letter to a friend is written in casual language, while a scholarship application is formal and respectful. But an academic paper is authoritative. A paper advances an original or unusual idea in a one-on-one forum; advancement depends largely upon the perceived authority of the person voicing the idea. If the written voice resonates with convincing force, it can prevail.
The best way to convey clout is to write the paper from a third-person point of view. This means a writer should not use “I” or “you” or “we” sentence structures, which are perfect for ordinary conversation and quite imperfect for scholarly presentation. Employing the less intimate third-person objective voice lets the collected persuasive material speak for itself.
要让文句切中要点，最好的方法就是用第三人称写作。换句话说，不要采用“I”、 “you” 、 “we”开头的句子。这些句子用在一般对话中似无不妥，但用在学术表达则显得有失稳当。第三人称句子读起来少了亲近、也较客观，更能突显文章的整体论述。
The third-person perspective also conveys authority because it increases the “distance” between an author and the subject of a paper. The writer disappears when “I” is dropped from the text. Similarly, the reader is not dragged into it when “you ” is absent. The resulting vacuum is filled by the influential “voices” of footnoted experts, laboratory data, and recorded experience.
The other voice rule in writing a paper is to use active language—though not always. Passive sentence construction does maintain desired “distance.” (Example: “The test was repeated four times,” rather than “I repeated the test four times. ”) However, an active voice propels a paper. (“Four tests produced identical results.”) Don't be lulled and dulled by “distance” considerations.
After the writer of an academic paper has exhaustively searched sources and validated a thesis, presenting it in a chatty, overly personal and unprofessional voice is such a wasted opportunity. The mechanics of effective presentation are not difficult to employ. Keep objective distance between writer and subject. Let the facts speak for themselves. Actively make the case.