英文關鍵字
agriculture
animal
barn
boar
breed
business
care
chew
color
cute
domestic
eat
ecology
economy
environment
farm
fat
fauna
feed
food
group
grow
hog
hungry
husbandry
income
industry
livestock
mammal
market
meat
money
nature
order
pig
piggy
piglet
pigpen
pigsty
pork
profit
queue
rural
snout
sow
straw
swine
trough