The removal of American nuclear forces brought a corresponding withdrawal of Russian troops.美国撤除核力量以后,俄军也相应撤回。They are seeking a first-strike capability that would knock out the enemy's nuclear force in a surprise attack.他们谋求能在突然袭击中一举摧毁敌方核力量的第一次打击能力。They are pushing hard to improve their strategic nuclear capabilities.他们正全力以赴增强他们的战略核力量。