tightenvt.使紧；勒紧；固定vi.变紧Tighten skin and loose fat消脂紧肤tighten your purse stringsvi.节省开支tighten up monetary policy收紧银根tightening macro-control加强宏观控制tighten the purse-strings紧缩开支tighten the knapsack straps紧一紧背包带Tightening Pinion Shaft Nut扭紧小齿轮轴螺帽tighten up the legal system加强法制建设tighten their purse stringsvi.节省开支tighten up the money supply通货紧缩,紧缩资金投放