30s
academician
activity
adult
audience
auditorium
blackboard
classroom
communication
confident
cooperation
course
educating
education
educator
emotions
explaining
faculty
focused
group
indoors
information
institute
intelligence
interaction
interior
knowledge
lecture
lecturer
lecturing
lesson
lifestyle
listening
male
man
mathematics
participants
people
portrait
professional
speaker
students
studying
teaching
training
tutorial
university
work
定額
Teacher giving lesson to group of adult studentsの素材 [FY310234236938]
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