英文關鍵字
action
background
business
caucasian
cell
chroma
click
communication
connection
digital
display
dragging
finger
gesture
gesturing
green
guy
hands
holding
internet
key
leg
male
man
message
mobile
motion
office
pad
person
phone
screen
scroll
smart
table
tap
technology
telephone
top
touch
touching
touchscreen
using
vertical
view
working