confident medical school student gives presentation about the human skeletal system - lecturer 個影片檔及 b 捲影像00:16
mature teacher teaching with multiracial students inside computer classroom at university - lecturer 個影片檔及 b 捲影像00:23
1951 montage professor lecturing students on town and country planning / london, england, united kingdom - lecturer 個影片檔及 b 捲影像00:08
1950s medium shot senior man in cap and gown making speech at podium / audience in background - lecturer 個影片檔及 b 捲影像00:20