機器
achievement
acre
alternate
blue
climate
cloud
clouds
cloudscape
corn
cornfield
countryside
current
ecological
ecology
electric
electrician
energy
environment
factory
farmland
field
gearbox
generator
german
germay
harp
heaven
modern
nature
net
recovery
renewable
revolve
sky
spare
sun
sun rays
tower
turbine
wheel
wind
windmill
yield