英文關鍵字
abstract
alga
algae
aquarium
aquatic
background
bottom
calm
clean
day
deep
environment
fish
fishing
flora
flow
freshwater
fry
grass
green
lake
lakeside
landscape
leaf
life
light
lily
little
moving
muddy
natural
nature
nobody
plant
pond
reed
river
seaweed
slime
sludge
stream
summer
sunlight
transparent
tree
underwater
water
weed
wet
world