英文關鍵字
abstract
animal
aquatic
area
avian
background
beak
beast
beautiful
beauty
bird
black
blue
calm
cygnet
cygnus
czech
day
elegance
europe
feather
feeding
graceful
green
houses
lake
landscape
light
love
mute
nature
neck
olor
outdoor
peace
peaceful
pond
purity
reeds
reflection
republic
residential
river
snowy
spring
sunny
swan
swim
swimming
water
white
wild
wildlife
wing
winter