英文關鍵字
adult
background
business
businessman
caucasian
cheerful
communication
communications
computer
contemporary
data
day
digital
display
global
hand
happiness
holding
human
indoors
internet
learning
lifestyles
male
men
mobile
mobility
monitor
net
outdoors
people
person
phone
preparation
reading
relaxation
screen
sitting
smiling
studying
surfing
tablet
technology
touch
touching
using
video
wireless
working
young