The government had retreated from its pledge to reduce class sizes.

政府已经改变了缩小班级规模的承诺。

《牛津词典》

It reminded me of my pledge class after a semester of hell, a feeling few folks understood from the outside looking in. It was a fraternity I wanted to join.

这让我想起自己在大学加入兄弟会的情景，经过一个学期的磨炼，我终于能够宣誓入会，这种感觉外人是很难理解的。

youdao

Many children recite the pledge of allegiance in class each morning which includes a reference to the US as "one nation under God".

许多儿童每天早上在教室里背诵效忠誓言，誓言中美国是一个“上帝治下的国家”。

youdao

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

The other factor for Obama would be with fiscally conservative Blue Dog Democrats and other Democrats who stood with Obama on the middle-class tax pledge.

CNN: Read his lips: Does tax pledge put Obama on shaky ground?

In other words, Obama violated his tax pledge to the middle class, whatever he claims to think about the individual mandate.

FORBES: Obama Administration: Obamacare's Individual Mandate 'Is a Tax'

The Republicans, for instance, pointed to a law that Dukakis had vetoed as governor that would have required teachers to conduct the Pledge of Allegiance with their class.

CNN: Christie, Cuomo and the Dukakis effect