英文關鍵字
20s
adult
and
area
businessman
campus
casual
caucasian
close
college
device
earphones
going
guy
happy
head
headphones
holding
listening
man
men
messaging
millennial
millennials
mobile
motion
move
music
one
outdoors
people
person
portrait
right
shoulders
slow
smartphone
spring
stroll
student
summer
sunlight
sunshine
swiping
texting
tourist
travel
using
walk
walking
walks
young