Over the longer term, the United States has spent more than $3 billion to help Russia and others eliminate more than 500 missiles and bombers, and to ensure that nuclear materials are safe and secure.
在更长的时间内，美国已耗资30多亿美元，协助俄罗斯和其他国家销毁500多枚导弹和炸弹，并确保核材料的安全和保障。