英文關鍵字
architecture
beach
building
canal
cascade
channel
coast
concrete
construction
dam
damm
engineering
fall
floodgate
flow
flowing
gate
gateway
hydro
lake
landmark
landscape
lock
motion
outdoor
overflowing
park
pool
recyclable
reservoir
river
rock
sanitary
scene
scenic
sewage
sluice
stone
stream
structure
system
technology
treatment
turbine
waste
water
watercourse
waterfall
wave
wet