The crowd suddenly turned violent.

人群中突然有人开始大打出手。

《牛津词典》

By 2008, the rivalry had turned violent.

到2008年，敌对状态更加激烈。

youdao

A man spotted me and his friendliness quickly turned violent.

一男子发现了我，他友善的面孔突然变得粗暴。

youdao

Some turned violent. In the North, a political party was created to oppose the Civil War.

VOA: special.2009.10.15

Some of their protests turned violent.

VOA: special.2009.11.05

Although their rally has been somwhat peaceful so far, many remember the Red Shirts' protests last year that turned violent.

VOA: standard.2010.03.27

Two brothers will each spend years behind bars after a row over a television turned violent.

BBC: Brothers jailed for 'vicious' Dundee attack

But on Friday, they turned violent in Pakistan's largest city, Karachi, and three people were killed.

CNN: Pakistan outlines conditions for assisting U.S.

The shopfront of the store was also attacked when a second protest turned violent.

BBC: Stokes Croft Tesco: Judicial review announced