英文關鍵字
abstract
background
blue
choppy
churn
churning
current
danger
dangerous
deluge
fast
flood
flow
flowing
fluid
foam
foaming
froth
green
liquid
maelstrom
motion
movement
moving
natural
nature
niagara
outdoor
powerful
rapids
river
rock
rough
rush
sea
splash
splashing
spray
spring
storm
stream
surface
surge
tide
torrent
turbulent
water
wave
weather