英文關鍵字
aerial
beautiful
clean
cloud
copter
day
daylight
daytime
desert
drone
electricity
energy
environment
farm
field
fuel
generator
industrial
innovation
landscape
large
mill
morning
nature
outdoor
outside
power
propeller
quadrocopter
renewable
rotation
sky
skyline
spring
station
summer
summertime
sun
sunlight
sunny
technology
turbines
usa
wind
windfarm
windmills