英文關鍵字
animal
background
beautiful
beauty
bird
black
blackbird
blue
cable
cleaning
day
electric
electrical
electricity
energy
feather
flock
fly
group
himself
india
indian
industrial
industry
isolated
line
low
metal
nature
outdoor
outdoors
power
row
silhouette
sitting
sky
slovakia
spring
steel
supply
technology
telephone
third
urban
utility
voltage
waiting
white
wild
wildlife
wire
world