ms pan zi science student examining molecular structure in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:16
ms science student examining chemicals in test tube and professor explaining students about molecular structure at laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:20
ms science students examining chemicals and writing on clipboard in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:26
ms science students examining chemicals and writing on clipboard in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:16
ms science students examining chemicals and writing on clipboard in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:12
ms science students using microscope and digital tablet in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:12
ms science students examining chemicals and using laptop, microscope in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:23
ms science students examining chemicals and using laptop, microscope in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:12印度人
ms science students examining chemicals and using laptop in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:19
ms zi professor explaining students about chemicals in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:27
ms science students examining chemicals in petri dish at laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:26
ms zi professor explaining student about chemical reaction with the help of pipette and petri dish in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:24印度人
ms pan science student examining chemicals in test tube and professor explaining students about molecular structure in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:10
ms pan zi professor explaining students about molecular structure in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:12印度人
ms pan professor explaining students about chemicals in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:32
ms pan science students examining chemicals and using laptop in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:17
ms pan science students examining chemicals in flask at laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:18
ms pan science students examining chemicals in test tube at laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:15
ms pan science students examining chemicals in test tube and using laptop at laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:14
ms pan science students examining chemicals in test tube at laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:22
ms pan professor explaining students about chemicals in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:28
ms pan professor explaining students about chemicals in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:18
ms pan science students examining chemicals in test tube, professor explaining in background / delhi, india - 燒瓶 個影片檔及 b 捲影像00:29
ms pan professor explaining students about chemicals in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:14
ms pan professor explaining students about chemicals in laboratory / delhi, india - 燒瓶 個影片檔及 b 捲影像00:10
