英文關鍵字
source
pipe
soil
mountain
rain
pure
water
dirty
tube
fresh
refreshing
stream
cold
nature
fount
flowing
flow
drink
stone
rainy
clean
cool
nobody
wet
fountain
brook
background
thirst
rural
dirt
rock
splash
natural
countryside
ecology
metal
wild
drop
fall
ecological
ecosystem
freshness
motion
liquid
river
closeup
hydration
rill
outdoor