wǒ yī biàn biàn jiě shì tóng yī jiàn shì，lián wǒ zì jǐ dōu kāi shǐ bù nài fán le

我一遍遍解释同一件事，连我自己都开始不耐烦了。

I explained the same thing over and over, and even I started to get impatient.