2 sentences

1. 那嗡嗡声是从哪来的？

   nà wēng​wēng​shēng shì cóng nǎ lái de?

   Where is that buzzing coming from?

   Source: AI Challenger 2017

2. 那是什么嗡嗡声？

   nà​shì shén​me wēng​wēng​shēng?

   What's that buzzing sound?

   Source: OpenSubtitles