Middle age man wearing scientist uniform measuring test tube writing on clipboard at laboratory
Palabras clave
senior,
mature,
elderly,
man,
male,
adult,
hispanic,
person,
portrait,
serious,
condensed,
concentration,
looking,
science,
research,
medicine,
scientist,
experiment,
technology,
medicals,
professional,
microscope,
chemist,
biology,
analysis,
work,
men at work,
working,
tube,
test,
goggles,
glove,
liquid,
clipboard,
checklist,
document,
writing,
write,
measuring,
clinic,
center,
hospital,
room,
indoor,
indoor,
laboratory,
laboratory,
chemistry
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