后悔: to regret, to repent...
前台: stage, proscenium, foreground in politics etc (sometimes derog.), front desk, reception desk, (computing) front-end, foreground...
任期: term of office, tenure (entire period in office)...
积累: to accumulate, accumulation, cumulative, cumulatively...
此外: besides, in addition, moreover, furthermore...
理: texture, grain (of wood), inner essence, intrinsic order, reason, logic, truth, science, natural science (esp. physics), to manage, to pay attention to, to run (affairs), to handle, to put in order...