과학자 그룹 녹색 액체의 비커를 공부
연구를하는 동안 비커를 들고 화학자
비커에 녹색 액체 실험을 두 화학자
Two chemists experimenting with the green and red liquid in testtube
비커에 넣고, 플라스크의 액체를 부어
Lab flask with chemical liquid. Close up of woman chemist in lab. Closeup of female chemist studying chemical liquid in beaker. Serious chemist working with liquid in glass flask at laboratory
A schoolgirl mixes chemicals in a beaker.
Virologist Mixing Two Solutions In A Beaker 4 K
Chemist mixing two liquids in the glass
Chemist mixing two liquids in a flask
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