英文關鍵字
academic
auditorium
blackboard
blind
business
change
class
classroom
college
conference
convention
dark
education
empty
furniture
hall
indoor
inside
interior
jalousie
learn
lecture
levels
light
meeting
microphone
presentation
projector
room
row
school
screen
seat
seminar
speaker
stairs
steps
study
switch
teach
theater
training
tribune
turn
uncouple
university
wooden