Old chemist teacher and two students in the classroom
Palabras clave
science,
scientist,
man,
student,
studying,
education,
scientific,
academic,
class,
classroom,
learning,
lesson,
school,
study,
university,
college,
teacher,
lecture,
lecturer,
explaining,
discussing,
board,
blackboard,
blackboard,
mentor,
back,
to,
teaching,
woman,
tutoring,
classmate,
secondary,
prof,
book,
textbook,
too,
many,
pile,
cheat,
sheet,
crib,
cheater,
cheating,
scared,
surprised,
caution,
cautioning,
expensive
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