1 sentence

1. 他毕竟少不更事，处理这类问题缺乏经验。

   tā bì​jìng shào bù gēng shì, chǔ​lǐ zhè lèi wèn​tí quē​fá jīng​yàn.

   After all, he is young and inexperienced, so he lacks the experience to handle such issues.

   Source: Dong Chinese Dictionary