英文關鍵字
action
around
background
blue
circle
circular
cyclone
danger
dangerous
deep
depth
drain
eddy
falling
flow
flowing
fluid
force
funnel
gulf
gyre
hole
hurricane
lake
liquid
maelstrom
motion
natural
nature
ocean
pool
purl
rip
river
rotor
round
scary
sea
spiral
splash
storm
surge
swirl
swirling
tide
tides
tornado
turbulance
turbulent
twirl
twist
vortex
vorticity
water
wave
whirl
whirlpool