英文關鍵字
apple
art
blackboard
board
books
chalk
chalkboard
class
classbook
coaching
college
continent
country
draw
drawing
earth
educate
education
geography
globe
green
greenboard
hand
illustration
knowledge
learn
learning
library
line
mainland
map
planet
rotate
school
schoolbook
science
sketch
spin
stack
study
studying
table
teach
teaching
textbook
travel
turn
twirl
university
world