英文關鍵字
abandoned
auditorium
background
blackboard
board
business
chair
chalkboard
child
class
classroom
college
computer
conference
contemporary
design
desk
education
educational
elementary
empty
floor
furniture
green
indoors
inside
interior
knowledge
learn
lecture
lesson
light
many
modern
nobody
office
pattern
room
row
school
seat
study
table
technology
training
university
vintage
white
wood
wooden