に先立って => before; prior to ~ N2
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
を中心に => focused on; centered on~ N2
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
て~て => Connect sentences N5
Line up, list
て … て => ... So very ..., extremely N3
Evaluate
ても~ても => even if ~ N4
Line up, list
て/なくて => Because/Because not N4
ては~ては => repetitive situations/actions N2
~をたて(~を経て)      => through; after; via N1
~にしてはじめて      => since at ~ N1
~ さて...てみると => Until ... then, ... then... N1
Time