到现在为止，那些枪基本是基于荣誉制度而被贩售的，也就是购买者向贩售者保证他们可以合法地购买武器。

Until now, those guns have been sold primarily on an honour system, wherein the purchasers ensure the sellers they are legally entitled to buy firearms.

《柯林斯英汉双解大词典》

你能保证不会向爸妈泄密吗？

Will you promise not to blab to Mom and Dad?

《柯林斯英汉双解大词典》

他向临终卧床的母亲保证永远不娶。

He promised his mother on her deathbed that he would never marry.

《柯林斯英汉双解大词典》

And I said to my advisor, "No, no. I have taken chemistry in high school, and I can assure you that chemistry has no relevance whatsoever to the life sciences."

于是我就去和我导师说：,“我在高中学过化学，我向你保证化学和生命科学,没有任何关联“

麻省理工公开课 - 化学原理课程节选

who were also issuing notes would leave their would keep a deposit with the Bank of England.

同时也在发行纸币的银行,要向英格兰银行付保证金。

耶鲁公开课 - 金融市场课程节选

In other words, if I'm a rich, wealthy person in Corinth, I would say, "I'll be the local tax collector, and I'll guarantee you I'll send to Rome this amount of money for a year."

换句话说，如果我是科林斯的富人，我会说，“我想当本地税吏，我保证每年向罗马缴纳多少多少钱“

耶鲁公开课 - 新约课程节选