2 sentences

1. 他的性子很急，总是一点就着。

   tā de xìng​zi hěn jí, zǒng​shì yī​diǎn jiù zháo.

   He has a short fuse and is always ready to blow up.

   Source: Dong Chinese Dictionary

2. 这匹马性子很野，没人能骑得了它。

   zhè pǐ mǎ xìng​zi hěn yě, méi rén néng qí dé​liǎo tā.

   This horse has a wild temperament; nobody can ride it.

   Source: Dong Chinese Dictionary