portrait of a young female microbiologist working on a laptop holding a test tube - 實驗室玻璃器具 個照片及圖片檔科學家
side profile of two boys mixing liquids in a science class and two girls (10-12) in background - 實驗室玻璃器具 個照片及圖片檔
portrait of a boy (10-12) writing notes beside a rack of test tubes - 實驗室玻璃器具 個照片及圖片檔十二歲到十三歲, 十歲到十一歲, 微笑
portrait of a young boy studying beside a rack of test tubes holding colored liquid - 實驗室玻璃器具 個照片及圖片檔