放弃核威慑 To renounce/abandon nuclear deterrence 第一次打击的能力The first-strike capability 签署一项全面禁止核实验条约 To conclude/sigh a comprehensive nuclear test ban treaty ..
The initial useof strategic nuclear weapons againstanuclear-armedadversary, theorized as feasibleonlyif the attackercandestroy the adversary's retaliatorycapacity.