英文關鍵字
agree
agricultural
agriculture
are
atmosphere
beads
beautiful
being
belt
belts
blue
camera
car
carrying
chemical
close
conveyed
conveyor
crane
depth
dust
equipment
factory
farmers
fertilizer
fertilizers
field
flying
hands
industry
line
looks
machine
machinery
material
mechanized
mixing
mixture
next
nitrogen
nourish
onto
pellets
picking
plant
plate
plowes
processing
producing
production
right
shot
smoke
step
swing
swings
train
transported
was
were
wheel
while
workers
yellow