pledge
单词辨析：
尤指公开或正式作出的保证。
The local government made a pledge to not compromise with terrorists.
当地政府保证决不向恐怖分子妥协。
Has he fulfilled his election pledge?
他履行竞选时的承诺了吗？
指强调某事一定会发生或肯定某事真实性的保证，尤为减轻他人的忧虑。
After my repeated assurances, she looked less worried.
经过我再三保证，她看起来不那么紧张了。
The tailor gave an assurance that her dress would be ready by Friday.
裁缝保证周五之前把她的裙子做好。
一般指对一定会做某事或某事肯定会发生的正式承诺。
The manager has given a guarantee that there will be no redundancies.
经理已经保证不会裁员。
Actually, there's no guarantee of success even if you can get the money.
实际上，即使你能得到那笔资金，也不一定会成功。
相关例句：
The government has now pledged £ 170m over the next six years for improving primary care.
为了改善初级卫生保健工作，政府已承诺在未来6年内拨款1.7亿英镑。
The central bank will provide special loans, and the banks will pledge the land as security.
中央银行会提供特殊贷款，而这些银行会以土地作为抵押。
I pledge myself to you body and soul.
我献于你我的身体与灵魂。
In the treaty both sides pledge to respect human rights.
双方在条约中都承诺将尊重人权。
The FA has resisted all entreaties to pledge its support to the campaign.
足协拒绝了一切希望它能承诺支持这次运动的请求。
The President pledged himself to increase taxes for the rich but not the middle classes
总统保证增加对富人而非中产阶级的税收。