当然だ/当たり前だ => natural; as a matter of course N2
... るとか ... るとか => それとも... または N4
Demonstrate by example
つきましては => about; concerning; regarding N2
Cause, reason
または => or N4
ままになる => Just let... N4
Continuous
~ではあるまいし      => it's not like; it isn't as if ~ N1
ではあるまいか => isn't it; I wonder if it's not ~ N2
Evaluate
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
あるいは~あるいは~ => or, either N3
Line up, list
ては~ては => repetitive situations/actions N2
ままにする => as, to do as ~ N4
Continuous
は...にV-てあります => is/has been done (resulting state) N4
Result status