核武器设计方面的技术进展意味着美国和英国可能很快就生产出新型弹头,而不必通过地下核爆炸来检验这种设计。这些进展可能部分地解释为什么两国政府不愿意与苏联就全面禁止核试验条约恢复谈判。 Technological advances in the design of nuclear weapons mean that the United States and Britain may soon produce new warheads without having to test the design by underground nuclear explosions. These developments may partly explain why the two governments are reluctant to resume negotiations with the Soviet Union on a comprehensive nuclear test ban treaty.