英文關鍵字
anatidae
animal
back
beauty
behavior
bird
care
carrying
cute
cygnet
cygnets
cygnus
elegance
family
feathers
female
freshwater
hair
horizontal
lake
large
lexington
love
loyalty
majestic
male
mammal
monogamous
movie
mute
olor
pond
protection
reflection
riding
river
small
swan
swimming
two
usa
usamy
watch
water
white
wildlife
wing
young