中 => While (Lasting) N3
Continuous
に[反「はん」]して/に[反「はん」]し/に[反「はん」]する/に[反「はん」]した => In contrast to A N2
Contrast,Surprise
... 反対に => on the contrary N3
Compare
途中で/途中に => on the way; in the middle of ~ N4
中 => During the period (Term) N3
Time
反面 => while, although; on the other hand~ N2
に反して => against; contrary to; in contrast to ~ N2
を中心に => focused on; centered on~ N2
~ひょうしに(~拍子に)   => the moment [A], unintentionally / inadvertently caused something to happen N1
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