英文關鍵字
agriculture
arboretum
background
conifer
conservation
ecology
environment
fir
forest
foresting
forestry
green
greenhouse
growth
heating
industry
leaf
lumber
natural
nature
needle
nursery
organic
outdoor
pellet
pine
plant
plantation
plants
reforestation
seed
seedling
silviculture
small
spruce
storm
texture
timber
tractor
tree
tropical
wood
young