事实证明，履行承诺比许下承诺是困难很多的。

Carrying through on promises is proving far harder than making them.

她开始催促男友对（二人的）将来许下承诺。

She has begun pushing her boyfriend to make a commitment for the future.

七十五年前的今天，富兰克林·罗斯福许下承诺。

Seventy-five years ago today, Franklin Roosevelt made a promise.

我可以再次变成那个曾经傍晚穿着我最体面的衣服穿过萨里公园大言不惭地对你许下承诺的人。

I can become again the man who once crossed the Surrey Park at dusk in my best suit, swaggering on the promise of life.

但环保活动家指出，该目标不足以抵销潜在的灾难性气候变化，并批评八国集团未有就中期目标许下承诺。

But campaigners said the goal was insufficient to offset potentially catastrophic climate change and criticised the lack of a commitment to mid-term targets.