When you make a pledge, you should always try to fulfill it.

你许下了诺言，就必须始终努力去兑现它。

youdao

Sweden had yet to make a pledge for that period, but was expected to do so.

瑞典目前尚未作出此时间段的承诺，不过应该会这么做。

youdao

Knowing the love we'll Miss. Oh, let us make a pledge to meet in September and sealed with a kiss.

我知道爱会让我们彼此相思。呵，我们立个誓，以吻来封缄，九月再相见。

youdao

The White House says President Barack Obama will attend next month's climate change summit in Copenhagen,Denmark, and will make a provisional pledge to cut U.S.greenhouse gas emissions by 17 percent from 2005 levels by 2020.

VOA: standard.2009.11.26

So, I make a pledge. You give me seven hours a week, you will pass this class, not just by the skin of your teeth. You will pass it.

我保证，你们要是一周学习7个小时，肯定可以通过这门课，一点都不惊险，你们会通过的。

麻省理工公开课 - 固态化学导论课程节选

You can also weigh in on Twitter or make a pledge on Facebook.

FORBES: Influencing Behavior: What Will It Take to Save 600,000 Lives a Year?

So, if you like what you're hearing and you're not afraid of a little manual labor, head on over to the source link below to make a pledge.

ENGADGET

Backers of the program say its mere existence is a sign of progress, with firms that usually are competitors coming together to make a pledge they will need each other to meet.

WSJ: Smaller Size? No Thanks to This Pledge