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 - 染色測試 個影片檔及 b 捲影像00:09細菌
1936 cu scientist testing yeast under a microscope at anheuser busch brewery in st. louis / missouri, united states - 染色測試 個影片檔及 b 捲影像00:10