happy mature professor giving a lecture in front of her students at lecture hall. - 演講廳 個照片及圖片檔教授, 課室, 教師
history british royalty, prince of wales, later king edward vii, attending lectures by dr lyon playfair at edinburgh university, victorian 19th century - 演講廳 幅插畫檔、美工圖案、卡通及圖標課室, 歸檔, 大學
teacher writing on the board while teaching a class to a group of medical students - 演講廳 個照片及圖片檔醫生, 培訓班, 學習
portrait of a young student woman holding a digital tablet at university auditorium - 演講廳 個照片及圖片檔少年男女, 學生, 大學學生
high angle view of multiracial male and female students sitting in lecture hall at university - 演講廳 個照片及圖片檔大學學生, 學習, 讀書
multi-ethnic group of students engaged in stem coding lecture with instructor presenting - 演講廳 個照片及圖片檔大學, 演示 - 演講, 技術
a woman in a blue blazer raises her hand actively during a seminar in a bright convention hall at office - 演講廳 個照片及圖片檔亞洲和印度人, 培訓班, 學習
