名词
中文翻译：Unknown
同义词：
['oath', 'pledge', 'vow', 'solemn oath']
例句：
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1. The king made a Stygian oath to protect his people.
国王发誓要保护他的人民。
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2. She took an oath never to speak of the past again.
她发誓再也不提过去的事情了。
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3. The priest made a solemn oath to perform a miracle.
牧师发誓要执行一个奇迹。