"...in a Dynamic translation, many addresses can appear as one, or one address can appear as many."
Writing the clause in this manner maintains parallel structure, 1 also referred to as parallelism. 2
This clause also employs repetition, "...a major rhetorical strategy for producing emphasis, clarity, amplification, or emotional effect." 3
1. "Parallel structure means using the same pattern of words to show that two or more ideas have the same level of importance." - Purdue OWL (Online Writing Lab)
Parallelism is the presentation of several ideas of equal importance by putting each of them into the same kind of grammatical structure. ... Parallelism provides several benefits:
* Clarity. Sentences with parallelism are easier to understand than those without it because a repeated grammatical structure requires less mental process than a series of new structures.
* Balance. Parallel structures make it easier for the reader to hold each of the ideas in mind while reading the subsequent ideas.
* Rhythm. Most readers hear in their minds the words they read. The sound, the musical nature, of the words adds to (or detracts from) the overall reading experience. Parallel structures are more rhythmic than nonparallel structures.
* Elegance. ... Appropriate use of parallelism provides a texture--even a beauty--to writing that makes it more readable and engaging.
The parallelism quote immediately above is from the following excellent book, which is available in the original paperback or in a new eBook edition. (I have no affiliation with the author or publisher and the OCLC link goes to the WorldCat.org website, which contains information on where to find books in one's local library.)
Harris, Robert A. Writing with Clarity and Style: A Guide to Rhetorical Devices for Contemporary Writers. Los Angeles, CA: Pyrczak Pub, 2003. Print. ISBN-10: 1884585485 ISBN-13: 9781884585487 OCLC: 50825579
Harris, Robert A. Writing with Clarity and Style: A Guide to Rhetorical Devices for Contemporary Writers. London: Routledge, 2017. eBook. ISBN-10: 1351968602 ISBN-13: 9781351968607 OCLC: 958455216
3. figures of repetition, Silva Rhetoricae (rhetoric.byu.edu), Brigham Young University.