英文關鍵字
agricultural
agriculture
animal
barn
bin
boar
building
cage
contemporary
cultivation
domestic
family
farm
farming
feeding
food
group
growth
hog
industrial
industry
inside
livestock
looking
lot
mammal
meat
modern
pig
piggy
piglet
pigpen
pigsty
pork
ranch
silo
small
snout
stable
straw
swine
white
factory
of
animals
equipment
production
population
explosion