英文關鍵字
aerial
barrier
bird
bridge
city
cityscape
concrete
construction
dam
development
ecology
electricity
energy
engineering
environment
evening
extreme
eye
factory
forest
heavy
industrial
industry
morning
outdoors
park
pipe
pollution
power
river
sector
sky
smog
smoke
station
steam
structure
sunrise
sunset
supply
technology
town
toxic
travel
tree
urban
view
water
waterfall
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