2 sentences for 達 (dá — to understand)

1. 我肯定他会通情达理的。

   wǒ kěn​dìng tā huì tōng​qíng​dá​lǐ de.

   I'm sure he'll be reasonable.

   Source: OpenSubtitles

2. 我们是两个通情达理的人。

   wǒ​men shì liǎng​ge tōng​qíng​dá​lǐ de rén.

   We're both reasonable people.

   Source: Tatoeba