英文關鍵字
agriculture
barley
biology
brown
cereal
chemical
chemistry
clinical
closeup
corn
crop
equipment
experiment
flask
food
glass
glassware
grains
harvest
healthy
lab
laboratory
liquid
many
medical
natural
nature
nobody
plant
research
rye
scientific
seeds
spike
staple
test
transparent
tube
wheat
white
whole
yellow