英文關鍵字
atom
nuclear
energy
symbol
monochrome
electricity
fuel
power
electric
battery
turbine
dam
coal
gas
linear
contour
logo
background
lined
nature
water
hazard
factory
flame
biofuel
business
oil
technology
ecology
charge
renewable
city
eco
derrick
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
glyp