英文關鍵字
arctic
beautiful
blue
branch
bright
cable
chill
cold
covered
danger
electric
electrical
electricity
energy
engine
engineering
equipment
forest
frost
frozen
high
ice
icicle
icier
industry
light
line
nature
outdoors
phenomenon
plant
pole
power
powerline
rain
season
silhouette
sky
snow
station
steel
supply
technology
temperature
transmission
utility
voltage
weather
winter
wire