英文關鍵字
abstract
backgrounds
blue
breaking
bubble
clean
close
cold
creek
crisp
current
dam
deluge
detail
energy
environment
fall
falling
flood
flowing
fluid
flux
forest
fresh
freshness
landscape
light
liquid
majestic
mountain
nature
outdoors
power
pure
purity
rapid
recreation
river
rock
speed
stone
stream
tide
torrential
transparent
urgency
water
waterfall
wet