2 sentences

1. 当他起身时，他的膝盖咯吱作响。

   dāng tā qǐ shēn shí, tā de xī​gài gē​zhī zuò​xiǎng.

   His knees creaked as he stood up.

   Source: AI Challenger 2017

2. 一只狗在咯吱咯吱地啃着骨头。

   yī zhī gǒu zài gē​zhī​gē​zhī de kěn zhe gǔ​tou.

   A dog was crunching on a bone.

   Source: UM-Corpus: Science