英文關鍵字
bend
brown
cascading
central
europe
clear
cold
concrete
creek
damage
ditch
drainage
drains
flood
flow
flowing
forest
frost
frosty
frozen
gorge
grass
gray
heavy
ice
icing
landscape
leaf
meander
narrow
nature
outdoor
park
quickly
riverbed
sewage
slope
small
steep
storm
straight
stream
supplies
tiles
transport
upper
view
waste
water
white
winter