英文關鍵字
animal
bird
birds
birthday
blue
calm
cygnus
elegant
feather
garden
graceful
lake
mute
natural
nature
ornithology
outdoor
park
peaceful
pond
river
romance
royal
spring
swan
swans
swimming
symbol
water
white
wild
wildlife
wing
wings
英文關鍵字
animal
bird
birds
birthday
blue
calm
cygnus
elegant
feather
garden
graceful
lake
mute
natural
nature
ornithology
outdoor
park
peaceful
pond
river
romance
royal
spring
swan
swans
swimming
symbol
water
white
wild
wildlife
wing
wings