中 => While (Lasting) N3
Continuous
一方では...他方では => On the one hand N2
Compare
途中で/途中に => on the way; in the middle of ~ N4
中 => During the period (Term) N3
Time
… 方 => the way to do something N4
Description
一方だ => more and more; continue to ~ N2
を中心に => focused on; centered on~ N2
最中に => while; during; in the middle of ~ N3
途中 (は) => on the way; in the middle of ~ N3
Halfway
中 => Throughout, all over, during the course of N5
Time
一方 => on one hand, on the other hand; although ~ (conjunction) N2
(の中)で~が一番~です => out of this group, [A] is best N5