[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
を => Over , across, along... N5
Particles
をはじめ/をはじめとする => For example, A N2
Lists, Examples
を[経「へ」]て => After A N1
Time, Situation
をもとに/をもとにして => A as a basis for B N2
Based, Focused, Depending on
ものを => Although A, (unfortunate result) B N1
Contrast/Surprise
をください => Please give me N N5
Asking and Telling
をかわきりに => Starting with A N1
Miscellaneous
を[込「こ」]めて => Put A into it N2
Will, Decision, “Doing”
を[踏「ふ」]まえて => Thinking of A N1
Based/focused/depending on
を[機「き」]に => Use A as an opportunity N1
Time, Situation
ふりをする => To pretend to (be) A N3
Adjectival, Description