adult
audience
auditorium
background
blur
blurry
boardroom
business
busy
class
classroom
college
concept
conference
crowd
day
education
event
group
hall
high
knowledge
large
learn
lecture
meeting
men
month
note
people
person
presentation
public
room
row
school
seminar
sit
speaker
speaking
stress
study
studying
teacher
teaching
training
university
watching
women
world
定額
School classroom blurred background of college or university students back view sitting in class in seating rows studying learning course in lecture room with white projector screen in frontの素材 [FY310111257600]
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