化学の授業中に新しい科学実験を考える悲しい少年 - ストックフォト＆画像

Chemist boy looking at flasks with liquids contemplating about experiments

Boy in protective gloves and glasses studying sediments in flask with red liquid

Boy in protective glasses pouring chemical substance in tube, checking reaction

Schoolboy looking at red liquid in flask and scratching head, having no idea

Concentrated boy planning to conduct chemical experiment with colored liquids

Smiling boy in protective glasses conducting chemical experiments in class

Female chemist looking at colored liquids in flasks, developing new substance

Chemistry student mixing liquids in scientific laboratory, conducting experiment

Female scientist comparing flasks with colored liquid, detergent laboratory

Chemistry student dripping liquid in test tube conducting experiment in lab

Chemistry experimenter writing down results of scientific researches in lab

Woman scientist holding pipette with liquid and taking test tube with reagent