Middle age grey-haired man wearing scientist uniform using pipette at laboratory
Palabras clave
senior,
elderly,
man,
male,
person,
caucasian,
mature,
grey-haired,
lifestyle,
expression,
science,
laboratory,
research,
medicine,
scientist,
experiment,
laboratory,
technology,
medicals,
professional,
chemistry,
microscope,
chemist,
biology,
analysis,
work,
men at work,
working,
pipette,
dropper,
sample,
holding,
serious,
condensed,
concentration,
looking,
clinic,
center,
hospital,
room,
indoor,
indoor,
interior
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