academic
attendance
audience
blured
business
businessman
caucasians
center
class
coaching
conference
congress
convention
corporate
crowded
education
event
group
indoor
information
institute
knowledge
lecture
listeners
listening
many
meeting
mobile
multitude
notes
participants
people
phone
presentation
professional
public
seminar
sitting
speaker
speech
students
study
summit
talk
texting
training
university
unsharp
workshop
writing
定額
Abowe shot of blured audience in conference hall. Presentation in lecture hall at university workshop. Rear view of unrecognized participant in audience. Scientific conference event.の素材 [FY31082981798]
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