These protesters vow to keep the issue in front of the American public until peace and justice prevail in Darfur.

VOA: standard.2010.05.23

You have a freewill offering--just because someone wants to do this, a freewill offering. And you have a vow offering that would be offered on the successful completion of a vow, for example. And these sacrifices are all entirely optional.

自由祭品--只因为有人想这么干，自由祭品，还有一个誓言祭品,举个例子，一个誓言如果成功达成，便会供奉祭品，这些祭品都是可选择的。

耶鲁公开课 - 旧约导论课程节选

Hundreds of the border guards remain in hiding, amid a government vow to swiftly punish those responsible for the killings.

VOA: standard.2009.03.26

But he says many families vow to return home only when it is fully safe to do so.

VOA: standard.2009.06.19

It has threatened war if Japan follows through on its vow to shoot down the rocket if it appears to threaten Japanese territory.

VOA: standard.2009.04.01

Hatoyama and his DPJ have promised consumer-oriented assistance such as child-support payments to help families, and vow to overhaul structures that favor corporations.

VOA: standard.2009.08.31

They also hailed Mr.Obama's vow to close the Guantanamo Bay detention camp within a year, although they are more cautious about possibly accepting ex-detainees.

VOA: standard.2009.03.29

As Somalis prepare to observe the start of the Muslim holy month of Ramadan, al-Shabab and Hisbul Islam rebels appeared to have made good on their vow to mark the start of Ramadan with intensified attacks against the government and the African Union mission in Mogadishu known as AMISOM.

VOA: standard.2009.08.21