英文關鍵字
arm
bay
beautiful
beauty
brook
bubbling
cascade
cataract
cliff
clouds
cold
creek
damp
danger
dangerous
draining
drop
drops
environment
fall
flow
flowing
foam
foaming
fort
freshwater
furious
gorgeous
inlet
mountain
natural
nature
outdoor
power
river
rivulet
roaring
rock
run
spray
spring
stone
stream
tributary
water
waterfall
wet
white
wild