presentation管 （0） 4

1 min 38 secs

6 mins

5 mins 1 sec

6 mins

17 secs

36 secs

52 secs

56 secs

8 mins 10 secs

44 secs

4 mins 31 secs

1 min 49 secs

11 mins 16 secs

2 mins 4 secs

23 secs

12 secs

2 mins 31 secs

14 mins 55 secs

1 hour 19 mins

44 secs

46 secs

12 mins 35 secs

48 secs

13 mins 54 secs

3 mins 45 secs