Senior man wearing scientist uniform using microscope at laboratory
Palabras clave
senior,
elderly,
mature,
grey-haired,
person,
portrait,
adult,
caucasian,
old,
happy,
confident,
smile,
lifestyle,
expression,
smiling,
enjoy,
fun,
science,
research,
medicine,
scientist,
experiment,
technology,
medicals,
professional,
microscope,
chemist,
biology,
analysis,
men at work,
working,
tube,
test,
goggles,
write,
writing,
clipboard,
checklist,
document,
clinic,
center,
hospital,
room,
indoor,
indoor,
laboratory,
laboratory,
chemistry
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