abstract
auditorium
background
business
businessman
center
chair
college
concept
conference
convention
corporate
day
education
empty
event
group
hall
information
international
learning
lecture
line
meeting
nobody
presentation
professional
public
room
row
school
seat
seminar
show
speaker
speech
stage
study
summit
technology
training
university
vintage
working
workshop
定額
vintage tone image of empty auditorium room and row of chair for background usage.の素材 [FY31082109765]
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