英文關鍵字
africanamerican
allowance
ban
black
boy
break
call
calling
carefree
cell
cellphone
cellular
close
closeup
college
communicate
communication
computer
conversation
digital
disruption
distracted
education
exam
gadget
generation
inattentive
internet
mobile
phone
prohibition
pupil
restrict
school
schoolboy
schoolchildren
smartphone
speaking
student
talk
talking
technologies
teen
teenager
test
university
up
using
violation