英文關鍵字
background
business
cut
deforestation
driver
driving
environment
evergreen
exterior
fir
firewood
forest
forestation
foresting
forestry
green
industrial
industry
land
load
log
logger
logging
logs
lumber
nature
oregon
pine
resources
rig
road
semi
sound
timber
trailer
transportation
transporting
trees
truck
vehicle
wilderness
wood
working