children having fun with scientific experiment in the school laboratory - 化學課 個照片及圖片檔兒童, 童年, STEM - 主題
sainte-claire deville, painting by léon augustin l'hermitte - 19th century - 化學課 幅插畫檔、美工圖案、卡通及圖標科學家, 歸檔, 19世紀風格
kids science, happy teacher 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 個照片及圖片檔教師, 兒童, 實驗室
a teacher supervising students doing a chemistry experiment with lit gunpowder - 化學課 個照片及圖片檔教育, 燃燒, 學習
midsection of young male student pouring liquid solution in flask on table at laboratory - 化學課 個照片及圖片檔實驗室, 工程師, 歐洲
chemistry laboratory in the past, wood engraving, published in 1880 - 化學課 幅插畫檔、美工圖案、卡通及圖標鍊金術, 插圖, 實驗室
chemistry teacher explaining an assignment to a group of young students at the laboratory - 化學課 個照片及圖片檔課室, 學習, 教育
abstract molecule scientific research technology futuristic chemistry background pattern - 化學課 幅插畫檔、美工圖案、卡通及圖標分子, 分子結構, 抽象
Chemistry teacher wearing a white lab coat in the classroom, inspecting a test tube full of yellow liquid, with a periodic chart of the atoms hanging...
modern empty science laboratory with microscopes, test tubes and other laboratory equipments - 化學課 個照片及圖片檔實驗室, 背景 - 主題
blue facial serum in petri dishes and flask on white background. cosmetic and medicine research concept. laboratory glassware close up - 化學課 個照片及圖片檔
schoolgirl in chemistry classroom, schoolgirl in contemplation while staying in chemistry laboratory class - 化學課 個照片及圖片檔兒童, 童年, 女孩
science laboratory with microscopes, computers and laboratory equipments - 化學課 個照片及圖片檔實驗室, 背景 - 主題, 無人
curious boys conducting science experiment. laboratory interior, seething, foamy liquid. celebrating success - 化學課 個照片及圖片檔學生, 課室, 教育
two teenage young women in high school chemistry class, conducting chemical experiment. (photo by h. armstrong roberts/retrofile/getty images) - 化學課 個照片及圖片檔
