Middle age man wearing scientist uniform looking 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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