She vowed never to speak to him again.

她发誓再也不和他说话了。

《牛津词典》

She vowed to herself that she would dedicate her life to scientific studies.

她默默地发誓要献身于科学研究。

《新英汉大辞典》

Grandmama was very much surprised, for she vowed that Peter looked far from wicked.

奶奶非常吃惊，她发誓彼得看上去一点也不邪恶。

youdao

After visiting Vienna in 1933, she vowed to fight against the persecution of Jews.

BBC: Australia WWII agent Nancy Wake's ashes scattered

She vowed to repay the relative, whom she declined to name, in 90 days.

WSJ: On Front Lines of Debt Crisis, Luggage Maker Fights for Life

She vowed not to open it until she could read it from the stage accepting her award.

CNN: Country singer aims to break down barriers