英文關鍵字
artificial
big
boy
caucasian
child
childhood
children
chute
crater
creating
curious
cyclone
discovery
eddy
entertainment
experiment
force
funnel
gulf
hopper
huge
indoors
leisure
looking
maelstrom
museum
natural
nature
people
physics
power
prores
reaction
science
simulating
simulator
storm
swirl
tornado
toy
turning
two
vortex
water
waterspout
whirl
whirligig
whirling
whirlpool