英文關鍵字
afternoon
alternative
and
architecture
background
business
city
clean
color
ecology
electricity
energy
environment
environmental
farm
field
generator
grass
heat
horizontal
house
industry
light
line
modern
nature
nobody
outdoors
panel
park
photovoltaic
power
production
reflection
road
sign
sky
solar
sun
symbol
system
technology
time
travel
wind