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