英文關鍵字
animation
building
bulb
business
cartoon
chemical
design
dirty
ecology
electric
electricity
element
energy
environment
environmental
factory
gas
gasoline
green
icon
illustration
industrial
industry
light
motion
nature
nuclear
oil
petrochemical
pipe
plant
plug
pollution
power
process
processing
recycling
refinery
renewable
solar
station
storage
structure
sustainable
technology
toxic
turbine
urban
waste
water
wind