他先做了简短的介绍，随后开始了正式演讲。

Tā xiān zuò le jiǎnduǎn de jièshào, suíhòu kāishǐ le zhèngshì yǎnjiǎng.

He first gave a brief introduction, and then began his formal speech.

地震发生后，随后又引发了海啸。

Dìzhèn fāshēng hòu, suíhòu yòu yǐnfā le hǎixiào.

After the earthquake, a tsunami followed.

警察赶到现场，随后救护车也到了。

jǐngchá gǎndào xiànchǎng, suíhòu jiùhùchē yě dào le.

The police arrived at the scene, and then the ambulance arrived too.