adult
african ethnicity
africanamerican ethnicity
analyzing
biochemistry
biology
biotechnology
candid
caucasian ethnicity
chemist
chemistry
computer
concentration
doctor
education
equipment
expertise
holding
indoors
lab coat
laboratory
looking
medical occupation
men
microscope
mid adult
mouse
multiethnic group
occupation
professional occupation
research
science
scientific experiment
scientist
smiling
standing
student
teamwork
technology
two people
uniform
women
working
young adult
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