indian female researcher analyzing samples using microscope in a modern university laboratory - 化學課 個照片及圖片檔印度人, 科學家, 實驗室
multiracial female students doing experiment in science laboratory at high school - 化學課 個照片及圖片檔實驗室, 學生, 大學
hydrogen periodic table element, mining, science, nature, innovation, chemical elements used in physics and other sciences - 化學課 個照片及圖片檔化學元素週期表, 發現
research, tablet and mature scientist working on an analysis or a science project in an office or lab using technology. professional, computer and woman technician reading experiment results online - 化學課 個照片及圖片檔科學家, 製藥業, 實驗室
chemistry teacher teaching students in the lab at school - including student with special needs - 化學課 個照片及圖片檔高中, STEM - 主題
chemistry teacher teaching students in the lab at school or university - 化學課 個照片及圖片檔教授, STEM - 主題, 學生