teacher 视频（22880）

15 mins 27 secs

9 mins 47 secs

32 mins 47 secs

4 mins 5 secs

34 mins 43 secs

1 min

8 mins 55 secs

9 mins 47 secs

6 mins 5 secs

7 mins

6 mins 9 secs

7 mins 57 secs

16 mins 37 secs

14 mins 5 secs

1 hour 30 mins

8 mins

18 mins 50 secs

1 hour 30 mins 43 secs

11 mins 4 secs

7 mins 46 secs

25 mins 19 secs

6 mins

2 mins 23 secs

5 mins 14 secs

5 mins 49 secs

27 mins 48 secs