4K Stressed nervous group of multiethnic diverse doctors men women interns medical students quarrelling coworkers confused stressed 影视素材 Stressed nervous group of multiethnic diverse doctors men women interns medical students quarrelling coworkers confused stressed 影视素材
4K Two multiracial female students arguing emotional university discussing conflict women girls hispanic latina angry two multiracial 股票录像 Two multiracial female students arguing emotional university discussing conflict women girls hispanic latina angry two multiracial 股票录像
4K 愤怒和震惊的学生使用笔记本电脑，项目丢失，文件删除，错误，非裔美国人，高加索女性，西班牙女性，数据 股票录像 愤怒和震惊的学生使用笔记本电脑，项目丢失，文件删除，错误，非裔美国人，高加索女性，西班牙女性，数据 股票录像
4K African american teacher in lab coat guiding three girls scooping adding metal tray seeing color classroom science experiment 股票视频 African american teacher in lab coat guiding three girls scooping adding metal tray seeing color classroom science experiment 股票视频
4K Female teacher in lab coat placing tube at counter guiding girls after left girl fiddling goggles female teacher in lab coat 股票视频 Female teacher in lab coat placing tube at counter guiding girls after left girl fiddling goggles female teacher in lab coat 股票视频
4K Female instructor guiding youth girls pipetting blue solution into test tubes during class demo lab students teacher chemistry 影视素材 Female instructor guiding youth girls pipetting blue solution into test tubes during class demo lab students teacher chemistry 影视素材
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