3 sentences

1. 我们不能放任他们这种行为不管。

   wǒ​men bù néng fàng​rèn tā​men zhè zhǒng xíng​wéi bù guǎn.

   We can't just let them get away with this kind of behavior.

   Source: OpenSubtitles

2. 政府不能放任这种污染行为继续下去。

   zhèng​fǔ bù néng fàng​rèn zhè zhǒng wū​rǎn xíng​wéi jì​xù xià​qù.

   The government cannot allow this kind of polluting behavior to continue unchecked.

   Source: Dong Chinese Dictionary

3. 政府对该地区的违章建筑长期放任，导致管理失控。

   zhèng​fǔ duì gāi dì​qū de wéi​zhāng jiàn​zhù cháng​qī fàng​rèn, dǎo​zhì guǎn​lǐ shī​kòng.

   The government's long-term neglect of illegal structures in the area led to a loss of control.

   Source: Dong Chinese Dictionary