中 => While (Lasting) N3
Continuous
途中で/途中に => on the way; in the middle of ~ N4
中 => During the period (Term) N3
Time
得る => can; to be able to; is possible to~ N2
を中心に => focused on; centered on~ N2
得ない => unable to; cannot; it is not possible to ~ N2
Ability
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
ざるを得ない => cannot help (doing); have no choice but to ~ N2
(の中)で~が一番~です => out of this group, [A] is best N5
[最中「さいちゅう」] => In the middle of A N3
Time, Situation