英文關鍵字
aerial
river
dam
machinery
greenery
summer
historical
indiana
serene
nature
industrial
energy
history
endurance
spring
bridge
rustic
concrete
decay
documentary
engineering
conservation
preservation
manmade
ecosystem
bucolic
英文關鍵字
aerial
river
dam
machinery
greenery
summer
historical
indiana
serene
nature
industrial
energy
history
endurance
spring
bridge
rustic
concrete
decay
documentary
engineering
conservation
preservation
manmade
ecosystem
bucolic