英文關鍵字
line
icon
animation
environmental
tax
taxation
burden
payment
pay
pollution
contamination
emission
industrial
factory
plant
production
energy
money
finance
regulation
green
clean
linear
motion
graphic
pictogram
hd
video
thin
logo
outline
loop
art
contour
drawing
animated
illustration
concept
web
symbol
flat
lineart
isolated
design
sign
item
dynamic
simple
dark