vow

They said their wedding vows, promising to love each other for the rest of their lives.

(Chinese) 他们交换了婚礼誓言，承诺余生彼此相爱。

The monks took a vow of silence as part of their religious discipline.

(Chinese) 作为宗教戒律的一部分，僧侣们发誓保持缄默。

We vowed never to betray each other's secrets, no matter what happened.

(Chinese) 我们发誓无论发生什么，绝不背叛彼此的秘密。

He vowed to return to his homeland once the war was finally over.

(Chinese) 他发誓一旦战争结束就回到祖国。