英文關鍵字
agriculture
bridge
building
cascade
cold
concrete
control
countryside
ditch
drop
edge
engineering
flood
flow
flowing
industrial
industry
irrigate
landscape
level
liquid
nature
overflow
pouring
power
reservoir
resource
river
rural
scenery
sluice
splash
station
stock
technology
view
wall
water
waterfall
waterfront
waterway
wet