3 sentences

1. 抓住另一个旋钮！

   zhuā​zhù lìng yī gè xuán​niǔ!

   Grab the other knob!

   Source: OpenSubtitles

2. 调节这个旋钮可以增大音响的音量。

   tiáo​jié zhè gè xuán​niǔ kě​yǐ zēng​dà yīn​xiǎng de yīn​liàng.

   Turning this knob can increase the volume of the audio.

   Source: Dong Chinese Dictionary

3. 你可以通过旋钮来调节音响的高音。

   nǐ kě​yǐ tōng​guò xuán​niǔ lái tiáo​jié yīn​xiǎng de gāo​yīn.

   You can adjust the treble of the stereo with the knob.

   Source: Dong Chinese Dictionary