機器
agricultural
agriculture
aircraft
apply
arkansas
autumn
away
back
business
carries
chemical
cloud
controversial
country
countryside
crop
dordogne
dust
dusting
economy
environment
farm
farmer
farming
farmland
field
fly
gear
grass
green
herbicide
insecticide
landscape
meadow
nature
nuts
outdoor
photophone
ripe
rural
rusted
rusty
technology
toy
tractor
tree
walnut
walnuts