The earthquake was preceded by a loud roar and lasted 20 seconds.

地震之前有一声巨响，持续了20秒钟。

《柯林斯英汉双解大词典》

There is a loud roar and a light engulfs them.

一阵巨大的咆哮和一阵强光吞没了他们。

youdao

It was like a loud roar of one of the human engines but different.

它像一记响亮的轰鸣引擎之一，但人类不同。

youdao

The Notre Dame All-America linebacker was chosen sixth in the second round by the Chargers, drawing a loud roar from the fans at Radio City Music Hall.

NPR: Teo's Time Is 2nd Round, 6th Pick To San Diego

He looked at it and let out a loud roar.

FORBES: Best Business Advice: When in Rome. . .Drink Polish Vodka

Local resident Che Kevlin told the BBC he heard a "loud roar" at 22:00 BST.

BBC: Essex Police investigate 'lion' sighting near St Osyth