英文關鍵字
barefoot
caution
clean
cool
cross
flow
foot
fresh
glacier
hands
human
legs
man
mountain
natural
nature
outdoor
outside
part
passes
passing
pebble
people
person
pristine
rapids
recreation
river
rocks
rough
shallow
shiny
smooth
stones
stream
surface
tent
texture
tourism
transparency
transparent
travel
walk
water