英文關鍵字
architecture
beautiful
blue
building
concrete
construction
control
creek
dam
electricity
energy
engineering
falls
flow
flowing
foam
forest
gate
generation
green
huge
hydro
hydroelectric
industrial
lake
landscape
lift
liquid
mighty
motion
nature
old
outdoors
power
reservoir
rhine
river
rural
small
spillway
station
stone
stream
streaming
structure
summer
travel
view
water
waterfall
waterfalls
wet