?背信弃义
... perfervidly = 非常热心 perfidies = 背信弃义 perfidious = 不诚实 ...
Some liberal senators, such as Idaho's Frank Church, led show trials on the CIA's perceived perfidies.
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The perfidies of ObamaCare are instantly known.
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英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。