英文關鍵字
animation
motion
green
screen
chromakey
escalator
icon
simple
isolated
black
flat
button
direction
staircase
stairway
step
symbol
transportation
walk
walkway
people
design
road
stick
traffic
urban
way
up
element
movingstaircase
navigation
object
communicate
communication
freeway
help
lines
pedestrian
escalate
floor
guide
illustration
info
information
lift
mall
passage
passenger
pictogram
public
sign
speed
stair