teacher 视频（22894 20）

24 mins 37 secs

4 mins 59 secs

5 mins 23 secs

12 mins 7 secs

1 min 33 secs

29 mins 38 secs

5 mins 33 secs

12 mins 58 secs

39 mins 58 secs

41 secs

8 mins 29 secs

12 mins 15 secs

6 mins 2 secs

3 mins 27 secs

14 mins

30 secs

22 mins 12 secs

36 mins 47 secs

13 mins 20 secs

12 mins 11 secs

6 mins 43 secs

4 mins

4 mins 3 secs

12 mins 52 secs

28 mins 58 secs

28 secs