4 sentences

1. 这起火灾被认定为蓄意纵火。

   zhè qǐ huǒ​zāi bèi rèn​dìng wéi xù​yì zòng​huǒ.

   This fire was determined to be a case of deliberate arson.

   Source: Dong Chinese Dictionary

2. 严禁蓄意毁坏公园内的公共设施。

   yán​jìn xù​yì huǐ​huài gōng​yuán nèi de gōng​gòng shè​shī.

   Deliberate damage to public facilities in the park is strictly prohibited.

   Source: Dong Chinese Dictionary

3. 那场森林大火是有人蓄意纵火引起的。

   nà cháng sēn​lín dà​huǒ shì yǒu rén xù​yì zòng​huǒ yǐn​qǐ de.

   That forest fire was caused by deliberate arson.

   Source: Dong Chinese Dictionary

4. 他因涉嫌蓄意谋杀其合伙人而被警方逮捕。

   tā yīn shè​xián xù​yì móu​shā qí hé​huǒ​rén ér bèi jǐng​fāng dài​bǔ.

   He was arrested by the police on suspicion of the intentional murder of his partner.

   Source: Dong Chinese Dictionary