英文關鍵字
action
age
agricultural
antique
backdrop
bark
brown
coniferous
corrosion
cutting
deforestation
destroying
dust
effort
environment
environmentalism
evergreen
firewood
forest
format
green
image
industry
lumber
manual
men
motion
moving
natural
nature
outdoors
people
person
physical
pine
progressive
rough
rugged
sawing
scan
spring
structure
surface
textured
timber
time
tree
trunk
view
wood