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professor helping a student in classroom
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dreamstime
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buy for Personal Use & Commercial
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20s
50s
adult
assignment
assistance
attention
book
casual
caucasian
clothing
college
communication
computer
concentration
connection
course
desk
education
electronic
explaining
guidance
half
happy
higher
indoors
information
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laptop
learning
lecture
length
making
male
man
mature
no
notebook
notes
pen
people
pointing
professional
professor
showing
sitting
smiling
student
studying
teacher
teaching
technology
touching
university
wireless
young