perfidiously的音标是[ˌpə:fɪˈdɪəslɪ]：

意思：不忠地；背信弃义地；狡猾地

释义：表示背信弃义或诡诈地行事。

用法：通常用作副词，修饰动词，后面可以接介词短语。

双语翻译：他表现得极其不忠，让人感到非常愤怒。

请注意，以上内容仅供参考，实际使用时请结合语境理解。

perfidiously，英语单词，主要用作副词，作副词时译为“背信弃义地；狡猾地”。

常见用法：perfidiously cunning 狡猾地

中文翻译：

释义：背信弃义地；狡猾地

例句：The enemy had perfidiously planned to attack at dawn.

敌人背信弃义地计划在天亮时发动攻击。

在英语中，perfidiously的使用通常需要更多的上下文信息，因为它的含义可能会根据语境而变化。总的来说，perfidiously是一个表示行为或性格的形容词，通常用于描述某人或某事物具有背信弃义或狡猾的特点。

perfidiously，中文翻译为“奸诈地；不忠实地”。

常见短语有：be perfidious in doing sth. 在做某事时很奸诈；perform perfidiously 奸诈地执行。

例句：He was perfidiously unpredictable. 他狡猾得让人捉摸不透。

perfidiously的用法和例句：

1. She was always suspicious of his perfidious silence. 她总是怀疑他那阴险的沉默。

2. He was a man of few words, but he could be as perfidious as a snake. 他话不多，但狡猾起来比蛇还狡猾。

3. He was a perfidious liar. 他是狡猾的骗子。

4. She was always on her guard against his perfidious ways. 她总是提防他狡猾的手段。

5. He was a perfidious traitor who betrayed his country. 他是一个背叛祖国的奸细。

6. She was always on the lookout for his perfidious tricks. 她总是提防他的狡诈伎俩。

7. He was a perfidious scoundrel who had no scruples about stealing from others. 他对偷窃别人财物毫无顾忌，是一个阴险的恶棍。

8. He was a perfidious and untrustworthy person. 他是阴险而不值得信任的人。

9. She was always on her guard against his perfidious behavior. 她总是提防他的不忠行为。

10. He was a perfidious and unscrupulous person who would do anything for money. 他是那种为了钱不择手段的人。

以上就是perfidiously的意思、释义、用法及双语翻译，以及常见的短语。希望这些信息能对你有所帮助。