名人教英文：肯尼迪经典演辞赏析（4）
肯尼迪就职美国总统之际，doctrine of deterrence（威慑论）主宰美苏两阵思维：双方竞相增强军备，以阻吓敌方，因为大家都知道，一旦开战，强大的核武足以?灭全世界。所以肯尼迪说： we dare not tempt them with weakness. for only when our arms are sufficient beyond doubt can we be certain beyond doubt that they will never be employed.
他呼吁两阵为和平而对话：
?let us never negotiate out of fear, but let us never fear to negotiate.（这句名言运用了chiasmus交错对句，前后句结构对称，但词序fear和 negotiate对调，形成对比。）
?let both sides explore what problems unite us instead of belaboring those problems which divide us.（以unite us对比divide us，表达寻求共同目标的愿望。）
?let both sides... bring the absolute power to destroy other nations under the absolute control of all nations...（重复the absolute... nations的结构，突出「核武」和「国际合作」的对比。）