I pledged my watch.

我以手表作抵押。

youdao

Upon first taking office in 2003, I pledged to end hunger in my country.

自2003年第一次就职时，我就曾承诺要在我国结束饥饿。

youdao

I pledged myself to protect her.

我发誓要保护她。

youdao

"I pledged America's continued commitment to the government and the people of Haiti in the immediate effort to save lives and deliver relief and in the long-term effort to rebuild.

VOA: special.2010.01.16

As I pledged at the outset, the role of American forces has been limited.

WHITEHOUSE: Weekly Address: The Military Mission in Libya

And I pledged to you then that if you gave me a chance, this time it would be different.

WHITEHOUSE: Signing the Tribal Law and Order Act

Today, I pledged to President Santos that as Colombia forges its future Colombia will continue to have a strong partner in the United States.

WHITEHOUSE: President Obama and President Santos Hold a Press Conference | The White House