英文關鍵字
age
board
caucasian
chart
college
compilation
concept
diagram
drawing
economics
education
finance
group
hall
high
hispanic
icon
indoors
knowledge
latin
learn
learning
lecture
lecturer
man
meeting
middle
montage
people
person
plan
planning
presentation
scheme
school
showing
sign
sketch
statistics
strategy
student
study
studying
talking
teacher
tutor
university
white
whiteboard
young