students celebrating with high-five while carrying out scientific experiment in the laboratory - 化學課 個照片及圖片檔幸福, 慶祝, 實驗室
lithium periodic table element, mining, science, nature, innovation, chemical elements used in physics and other sciences - 化學課 個照片及圖片檔鋰離子電池, 化學元素週期表, 技術
kids science, foam reaction and children experiment excited in a classroom having fun with learning. young scientist knowledge, assessment and helping with youth education research in a school class - 化學課 個照片及圖片檔兒童, 童年, STEM - 主題
senior teacher teaching teenage students in the laboratory - including a person with special needs - 化學課 個照片及圖片檔實驗室, 教授, 學生
female chemistry teacher explaining to young multi-ethnic students in laboratory - 化學課 個照片及圖片檔僅有女人, 實驗室, 教育