英文關鍵字
alternative
blades
blue
clean
cows
day
dirt
ecology
electric
electrical
electricity
energy
environment
environmental
equipment
fall
farm
fence
field
generate
generation
generator
green
ground
hills
horizontal
industrial
industry
kinetic
landscape
mill
mills
nature
posts
power
production
renewable
rolling
sky
slowly
spin
spinning
state
supply
sustainable
technology
three
turbine
turbines
turn
white
wind
windmill
windmills