英文關鍵字
attentive
attractive
boy
caucasian
cell
cellphone
child
comfort
communicating
communication
commute
commuter
commuting
concentrated
device
enjoy
fastmoving
focus
focused
gadget
hands
his
holiday
interest
interested
internet
locomotive
message
messaging
mobile
movement
old
passenger
phone
portrait
public
railroad
railway
ride
selective
sit
sitting
smartphone
technologies
technology
tourist
train
transport
transportation
travel
traveler
travelling
travels
uses
wagon
window
wireless
woman
years