英文關鍵字
aqua
architecture
background
barrier
clean
closeup
concrete
construction
cool
dam
day
diameter
eco
electricity
embankment
energy
engineering
environment
fall
flood
flow
flowing
fresh
hydro
hydroelectric
irrigation
lake
landscape
liquid
natural
nature
outdoor
power
reservoir
ripple
river
sky
spillway
splash
station
stream
structure
transparent
water
waterfall
wet
white