来自UNAM的一位老师给我进行了视频通话，我录制了

39 mins 36 secs

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45 mins 21 secs

1 hour 15 mins 27 secs

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2 mins 3 secs

23 mins 52 secs

8 mins 20 secs

4 mins 51 secs

9 mins 13 secs

12 mins 18 secs

34 mins 55 secs

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5 mins 9 secs

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14 mins 25 secs

1 hour 11 mins 57 secs

13 mins 40 secs

14 mins 20 secs

10 mins 3 secs

29 mins 40 secs

17 mins 13 secs