英文關鍵字
aerial
alternative
battery
cell
copter
countryside
day
drone
eco
ecological
ecology
electrical
electrics
electro
energy
environmental
farm
fields
fly
generated
generating
generation
green
industrial
light
line
modern
modules
new
panels
photovoltaic
plant
point
power
protection
quadcopter
renewable
resources
row
silicon
solar
sources
station
sun
sunlight
system
technology
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