英文關鍵字
agricultural
agriculture
around
audio
being
busy
cash
cereal
circulating
clip
close
cob
cobs
continuous
corn
crop
efficient
equipment
fast
feeding
footage
from
fuel
gear
grain
grains
hand
harvest
held
input
jumping
kernels
machine
maize
method
noise
operating
powered
process
produce
putting
red
removes
sheller
shelling
thresher
threshing
throwing
tossing
use
used
video
working