动词短语
中文翻译：发誓
同义词：
['promise', 'swear', 'vow']
例句：
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1. I promise to finish this project before the deadline.
我保证在截止日期前完成这个项目。
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2. She vowed never to let him down again.
她发誓再也不让他失望了。
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3. They made a vow to always support each other through thick and thin.
他们发誓无论遇到什么困难都要互相支持。