英文關鍵字
boy
businessman
cell
class
classroom
clever
closeup
copybook
device
education
electronics
fingers
gadget
grade
hands
holding
indoors
knowledge
learn
lesson
male
man
mobile
notebook
one
paper
pen
phone
pupil
reading
sagacious
school
screen
sensible
silver
smart
smartphone
studying
table
teenager
text
training
write
writing