“否决权”的英语可以翻译为：veto，[经] veto power ...

几个世纪以来否决权一直是外交上惯用的手段。The veto has been a traditional instrument of diplomacy for centuries.总统有否决权.The President has the power of veto.哪怕是你只行使否决权,我也不同意.I would refuse to let you even veto....