英文關鍵字
america
bark
beautiful
biology
blizzard
calm
chill
cold
conifer
conservation
cut
dense
ecological
ecology
ecosystem
environment
environmental
flora
forest
frigid
habitat
ice
illinois
land
landscape
natural
nature
outdoors
park
pine
preservation
pristine
rock
scene
scenic
serene
snow
snowfall
snowy
state
states
storm
tall
travel
tree
united
usa
vegetation
weather
wild
wilderness
winter
wonder
wonderland
woodland
woods