active
activity
adult
back
book
caucasian
cognition
concentration
concept
course
day
discussion
educative
effective
enjoying
finding
glasses
grayhaired
improving
information
intellectual
internet
knowledge
library
lifestyle
literature
male
man
material
modern
motivation
people
person
positive
program
reading
retired
selfeducation
senior
sitting
specialized
spending
student
study
subject
table
technology
time
view
定額
Back view of senior man spending time with books. Gray-haired man in glasses reading books in library finding information to study and enjoying active day. Self-education of retired people conceptの素材 [FY310195709507]
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