嗡嗡声

kōng zhōng chuán lái yī zhèn dī chén de wēng wēng shēng

空中传来一阵低沉的嗡嗡声。

There was a low humming sound in the sky.

xiàng jī fā chū wēng wēng shēng hé kā chā shēng

相机发出嗡嗡声和咔嚓声。

The camera whirred and clicked.