[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
を中心に => focused on; centered on~ N2
…のも無理 (は) ない => It's natural for... N3
Evaluate
のも無理もない => (to be) natural,(to be) understandable N3
Evaluate
しかし => But, nevertheless N5
Change the subject of the story
もし~としても/もし~としたって => Assuming; Even if ~ N3
し~し => and; and what's more ~ (emphasis) N4
...し, ...し, (それで) ... => Because... and..., so... N4
List
しかしながら => however, nevertheless N2
Things do not match the prediction
し(~し) => and ... N4
Cause and Effect
...し, ...し, ...から => and; and what's more ~ (emphasis) N4
Line up, list
…たりしたら/しては => ... Such as N3
Demonstrate by example