英文關鍵字
alone
application
boy
bubble
car
cell
cellular
chat
check
child
communication
conversation
correct
display
finger
friend
happy
holding
internet
kid
light
male
message
messaging
messenger
mobile
mobility
network
one
person
preteen
read
screen
send
sending
smart
social
talk
technology
teen
telephone
texting
thumb
touchscreen
type
typing
write
youth