演講簡報 Presentation
Blackwood: https://www.youtube.com/watch?v=akfPTSNvG5o
Gamelan: https://www.youtube.com/watch?v=x80qxrF96_A&list=OLAK5uy_m_bO6J4Ny2NwgFXGKSAVADhXJZKMUjzlc&index=3
