3 sentences

1. 他的生活态度一直很散漫。

   tā de shēng​huó tài​du yī​zhí hěn sǎn màn.

   His attitude toward life has always been very undisciplined.

   Source: Dong Chinese Dictionary

2. 他的生活作风十分散漫，经常迟到早退。

   tā de shēng​huó zuò​fēng shí​fēn sǎn màn, jīng​cháng chí​dào zǎo​tuì.

   His lifestyle is very undisciplined; he often arrives late and leaves early.

   Source: Dong Chinese Dictionary

3. 洪水漫过了河岸。

   hóng​shuǐ màn guò le hé'àn.

   The flood overflowed the riverbanks.

   Source: Dong Chinese Dictionary