他郑重地向大家道歉，希望得到原谅。

Tā zhèngzhòng de xiàng dàjiā dàoqiàn, xīwàng dédào yuánliàng.

He solemnly apologized to everyone, hoping to be forgiven.

我郑重承诺，一定按时完成这个项目。

Wǒ zhèngzhòng chéngnuò, yídìng ànshí wánchéng zhège xiàngmù.

I solemnly promise that I will definitely finish this project on time.

律师郑重提醒我们，在签字前要仔细阅读合同内容。

Lǜshī zhèngzhòng tíxǐng wǒmen, zài qiānzì qián yào zǐxì yuèdú hétóng nèiróng.

The lawyer solemnly reminded us to read the contract carefully before signing.