Micro-listenings are quick dictations and drills to help you develop your listening skills.
Listen as many times as you need to, and try to fill in as many gaps as you can.
, . , , .
But yeah, they . I think someone if they were paper, so if they of paper, then you'd paper that across.
But yeah, they are flat. I think someone worked that if they were the equivalent paper, so if they were the of paper, then you'd need a of paper that 1.7 miles across.
About the extract
...I think someone worked out that...