a hand in protective glove takes a petri dish with colorful nutrient agar from a white illuminated table with a lot of colorful petri dishes - 微生物學 個影片檔及 b 捲影像00:09細菌
paramecium bursaria and its symbiotic relationship with the green alga called zoochlorella. - 微生物學 個影片檔及 b 捲影像00:24
may 1, 2009 laboratory technician running test at centers for disease control operations center / atlanta, georgia, united states - 微生物學 個影片檔及 b 捲影像00:25