英文關鍵字
water
dam
stream
wall
forest
down
falls
waterfall
environment
nature
landscape
flow
flowing
river
outdoor
stone
summer
scenic
natural
view
cascade
fall
europe
ecology
mountains
energy
engineering
cascades
flood
generator
hydro
hydroelectric
industrial
lake
overflow
power
station
white
supply
technology
industry
construction
electricity
travel
mountain
levee
green
rock