Here are some stylistic features for you to be aware of:
Sentence variety:
Effective academic writing relies on a combination of (1) long sentences that relay complex ideas and (2) short sentences that pack more punch or allow the reader to catch their breath as a complex line of reasoning unfolds. In your own writing, try for a mix.
Diction:
Sophisticated academic writing is marked by an author’s choice of words. Big words are not necessarily better. Many style guides encourage writers to opt for plain English, when possible, over jargon.
First Person Pronouns:
For many students, academic writing will be marked by the absence of first person pronouns, though this may not always be the case. “I” can naturally invite the writer to express their opinion and distract the reader from the primary focus of the research.
Verbs:
Verbs matter. Strong verbs are key to cogent sentences. Verb tense matters too. Active voice makes for cleaner, more concise prose. Passive voice, however, can emphasize elements of a sentence that would otherwise remain hidden at the end.