1.背信弃义;不忠
2.叛变,出卖
1.behavior that shows that someone cannot be trusted
1.He was quite certain now that she knew he was married and was angered at his perfidy.
他现在已可以断定，她已经得知他是有妇之夫，对于他的欺瞒行为非常生气。
2.She paused at the sound of the last two words and wrung her hands. The knowledge of Hurstwood's perfidy wounded her like a knife.
她说到“有妇之夫”就说不下去了，痛苦地扭曲着双手。赫斯渥欺骗她的消息像一把刀捅到了她的心里。
3.Perfidy and fraud are the vices of civilized nations, credulity and violence those of the inhabitants of the desert.
背信和欺诈是文明国家的丑行，荒蛮之地的居民则是轻信和暴力。
4.China 's foreign policy has always been an often bizarre mix of pragmatism and perfidy.
中国的外交政策一直是一个常常奇怪的组合实用主义和背信弃义。
5.Nine months ago commentators at China's official Xinhua news agency were rueing Rio Tinto's "perfidy" in "kicking down the ladder" .
九个月前，中国官方新闻机构新华社的评论员悲叹说，力拓的“过河拆桥”行为是“背信弃义”。
6.Since votes were bought, no one paid much attention to economic policy: today's situation makes clear the perfidy of this oversight.
既然选票是买来的，没人会太在乎经济政策：很明显，正是这种忽略造成了如今的局面。
7.Oh, the perfidy of men!
啊，男人的奸诈！
8.already begun with circumstances of cruelty and perfidy scarcely parallel in the most barbarous ages.
其残忍与卑劣从一开始就连最野蛮的时代也难以相比。
9.Willful betrayal of fidelity, confidence, or trust; perfidy.
背叛对忠诚、信任或信赖的有意背叛；背信弃义
10.His plays are characterized by singleness and perfidy.
这种意义表现在他剧作的单一与多元两个特点上。