- 他承诺给这个地区带来新的工业，但是政治家很少完成他们的承诺。
He promised to bring new industries to the region, but politicians rarely keep their word.
- 不遵守承诺是可耻的。
It is a shame not to keep your promise.
- 我们不能违背我们的承诺。
We must not break our promise.
- 我们承诺万一他有麻烦的时候支持他。
We promised to stand by him in case of trouble.
- 我向你们承诺——我们作为一个整体将会达成目标。
I promise you, we as a people will get there.
- 他履行了他的承诺，并且帮助了他的兄弟。
He kept his promise and helped his brothers.
