2 sentences

1. 处理公务时，绝不能掺杂个人私情。

   chǔ​lǐ gōng​wù shí, jué bù néng chān​zá gè​rén sī​qíng.

   One must never mix personal feelings with official business.

   Source: Dong Chinese Dictionary

2. 由于他们的私情被曝光，两人都辞职了。

   yóu​yú tā​men de sī​qíng bèi bào​guāng, liǎng rén dōu cí​zhí le.

   Both of them resigned after their secret affair was exposed.

   Source: Dong Chinese Dictionary