cu selective focus machine injecting liquid into test tubes for chemistry experiments, new jersey, usa - 標本容器 個影片檔及 b 捲影像00:18
close up static - a green light shines under a microscope in an laboratory. / bloemfontein, south africa - 標本容器 個影片檔及 b 捲影像00:09
biology: exploring the living world - part 11 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 標本容器 個影片檔及 b 捲影像00:30
living by a ‘dying river’ – how pollution has put the wye into decline; wales: river wye: ext air views / aerials river surface / trees lining river... - 標本容器 個影片檔及 b 捲影像02:20