英文關鍵字
accumulation
animal
assemblage
bite
bloodsucker
cloud
colony
concentration
concourse
crowberry
crowd
crowded
dope
environment
fly
gnat
grass
green
group
heathberry
insect
insecticide
lichen
little
lot
many
mosquito
mosquitoes
moss
motion
mozzie
nature
nobody
outdoors
parasitic
parmelia
pasture
pest
plague
problem
protection
summer
swarm
wild
wildlife