They must have been swept away by the chaotic currents. 
ðeɪ mʌst hæv bɪn swɛpt ʌweɪ baɪ ðʌ keɪɑtɪk kɜ˞ʌnts. 
 Indian's voice is monotone in tone and is delivered at a moderate speed. The recording is of very good quality, with almost no noise present, and the speaker's proximity to the microphone results in a slightly close-sounding recording.