英文關鍵字
green
person
summer
outdoors
field
nature
garden
plant
sunflower
healthy
seed
harvest
farm
agriculture
countryside
disease
gardening
dry
fungus
bad
quality
threat
drought
yield
analysis
picking
examination
rot
arid
affected
specialist
mold
parasites
viruses
indicators
examines
biologists
sunflower head
plant damage
examine sunflower
phytoviruses