因为势利行为时涨时落：它们的帝国崛起、衰退，直至以最为历史公认的方式败落。

因为势利行为时涨时落：它们的帝国崛起、衰退，直至以最为历史公认的方式败落。
【正确答案】：For snobberies ebb and flow; their empire rises, declines, and falls in the most approved historical manner.