を中心に => focused on; centered on~ N2
も同然 => just like; same as ~ N2
と同時に => at the same time as; while; simultaneously ~ N2
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1
も[同然「どうぜん」]だ => The same as saying A, as good as A N2
Adjectival, Descriptions