英文關鍵字
flood
tsunami
river
water
flow
stream
waterfall
nature
environment
rushing
brown
current
danger
dirty
flowing
motion
muddy
climate
damage
disaster
ecology
overflow
rain
speed
storm
wave
dam
hydro
force
hurricane
mud
splash
energy
engineering
electric
hydroelectric
hydropower
industry
dangerous
torrent
powerful
background
riverside
karelia