英文關鍵字
air
ambience
background
bark
biosphere
business
care
caresses
caucasian
concept
defense
earth
ecology
ecosystem
emotion
environment
forest
growth
habitat
hand
hug
human
industry
life
love
nature
one
outdoor
outdoors
oxygen
park
patronage
person
planet
preservation
prevention
protection
security
timber
touch
tree
trunk
woman
wood
world