英文關鍵字
automatic
business
combine
coniferous
damage
deforestation
ecology
environment
fall
felling
forest
greenpeace
harvester
industry
landscape
logging
lumberjack
machine
modern
natural
nature
nonlegal
outdoor
peaceful
pine
poaching
product
protection
red
saw
sawing
spring
spruce
summer
technological
technology
tree
wood
work
worker