英文關鍵字
traffic
education
usa
schoolchildren
transportation
top
kindergarten
aerial
neighbourhood
getting
road
cars
morning
kid
above
suburb
commuting
child
bus
street
regular
daily
public
school
standard
line
lane
children
elementary
safety
classic
everyday
view
driving
moving
yellow
students
routine
vehicle
depart
america
town
schedule
route