lecture管 （801） 11

8 mins 39 secs

2 mins 27 secs

14 mins

6 mins

17 mins 2 secs

2 mins 6 secs

2 mins 59 secs

15 mins 28 secs

13 mins 13 secs

4 mins 22 secs

3 mins 51 secs

1 min 7 secs

1 min 20 secs

1 min 39 secs

10 mins 30 secs

4 secs

13 mins 41 secs

5 mins 55 secs

6 mins 56 secs

30 secs

2 mins 51 secs

7 mins 59 secs

7 mins 38 secs

8 mins

5 secs

6 mins

7 mins