lecture管 （816） 2

1 min 15 secs

24 mins 45 secs

5 mins 18 secs

6 mins 7 secs

12 mins 9 secs

5 mins 23 secs

4 mins 54 secs

1 hour 37 mins 13 secs

2 mins 34 secs

5 mins 19 secs

5 mins 37 secs

7 mins 55 secs

18 secs

3 mins 23 secs

17 mins 6 secs

39 secs

7 secs

8 mins

12 mins 39 secs

6 mins

1 min

21 secs

6 mins 7 secs

6 mins 40 secs

47 secs

8 mins 17 secs

36 mins