2 sentences

1. 这种档子事儿，你就别管了。

   zhè zhǒng dàng​zi shì​r, nǐ jiù bié guǎn le.

   Don't bother yourself with this kind of business.

   Source: Dong Chinese Dictionary

2. 我还是搞不明白藻类和氧气这档子事。

   wǒ hái​shi gǎo bù míng​bai zǎo​lèi hé yǎng​qì zhèi dàng​zi shì.

   I still can't figure out this algae and oxygen business.

   Source: OpenSubtitles