折には => when the chance to 〜 comes N2
一口に…といっても => Although in general... N2
Evaluate
[折「おり」]には => When A, at the time A N2
Time, Situation
これ/それ/あれ => this/that N5
Spatial relations
~かれ~かれ      => sooner or later; more or less N1
であれ~であれ => whether [A] or [B] N1
…けれど => Explanation N3
Exclamatory
かれ~かれ => A or B N1
Lists, examples
それを => Despite that ... N2
Things do not match the prediction
それでは => Well then N4
Change the subject of the story
けれど => but; however; although N4
How to say the beginning
それでは => So (Inference) N4
Deduce