noun
a serious or formal promise, especially one to give money or to be a friend, or something that you give as a sign that you will keep a promise:
[ + to infinitive ] All the candidates have given/made pledges not to raise taxes if they are elected.
Thousands of people made pledges (= promised to give money) to the charity campaign.
I give you this ring as a pledge of my everlasting love for you.
verb
to formally promise to give or do sth 保证给予（或做）；正式承诺
~ sth
Japan has pledged $100 million in humanitarian aid.
日本已承诺提供一亿美元人道主义援助。
The government pledged their support for the plan.
政府保证支持这个计划。
~ sth to sb/sth
We all had to pledge allegiance to the flag (= state that we are loyal to our country).
我们都必须对国旗宣誓效忠。
~ to do sth
The group has pledged to continue campaigning.
这个组织发誓继续投入运动。
~ (that)…
The group has pledged that they will continue campaigning.
这个组织发誓他们将继续投入运动。