を中心に => focused on; centered on~ N2
~はめになる(~羽目になる)     => to get stuck with (some job); to end up with (something unpleasant) N1
のでは => if N3
Condition (hypothetical condition)
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
~のは…ぐらいのものだ => only (emphasis) N1
Limit
というのは => because N2
... というのは => It means... N3
Explain
そのはんめん(では) => on the other hand~ N3
Compare
たものではない => Impossible N2
Evaluate
のは…からだ => The reason... is because... N4
Cause, reason
~には~の~がある      => has its own~ N3
Characteristic
とはいうものの => having said that; be that as it may N2
Things do not match the prediction