3 sentences

1. 我们要坚决打击黑恶势力。

   wǒ​men yào jiān​jué dǎ​jī hēi è shì​li.

   We must resolutely crack down on organized crime.

   Source: Dong Chinese Dictionary

2. 他的性格刚烈，绝不向恶势力低头。

   tā de xìng​gé gāng liè, jué bù xiàng è shì​li dī​tóu.

   He has an unyielding character and will never bow to evil forces.

   Source: Dong Chinese Dictionary

3. 为了维护治安，警方开始在这一地区清扫黑恶势力。

   wèi​le wéi​hù zhì'ān, jǐng​fāng kāi​shǐ zài zhè yī dì​qū qīng​sǎo hēi'è​shì​lì.

   To maintain public order, the police began to sweep away criminal gangs in this area.

   Source: Dong Chinese Dictionary