2 sentences

1. 他在睡梦中咕哝了几句，接着又翻身睡着了。

   tā zài shuì​mèng zhōng gū​nong le jǐ jù, jiē​zhe yòu fān​shēn shuì​zháo le.

   He muttered a few words in his sleep and then rolled over and fell back asleep.

   Source: Dong Chinese Dictionary

2. 由于不满意公司的决定，他一整天都在低声咕哝。

   yóu​yú bù mǎn​yì gōng​sī de jué​dìng, tā yī zhěng​tiān dōu zài dī​shēng gū​nong.

   Dissatisfied with the company's decision, he was muttering to himself all day.

   Source: Dong Chinese Dictionary