類似のロイヤリティフリー動画
Close-up of research scientist writing notes in chemistry laboratory. There are flasks, beakers and test-tubes on the table.
Young woman in chemical laboratory holding a flask with blue and purple liquid. Focus on the flask. Close up
One female student in protective workwear scrutiny substance and development new vaccination at education training in university close up. Serious person holding pipet in hand and looking at reaction
続きを見る