英文關鍵字
advance
afforestation
after
altitude
arboriculture
autumn
blade
branch
breeding
closeup
cone
conifer
coniferous
crop
fir
forest
forestry
grass
green
grew
growing
growth
husbandry
management
natural
nature
outdoor
pine
regrowth
sandy
science
second
silviculture
small
soil
spring
spruce
summer
sylviculture
system
tree
trees
undergrowth
wood
young