英文關鍵字
green
light
plant
water
active
aqua
aquatic
backgrounds
bay
below
bottom
clean
clear
closeup
cold
cool
deep
drop
fish
fishing
lake
life
lily
liquid
locations
nature
nonurban
outdoor
pads
pattern
microscope
diatom
rippled
microscopic
wave
transparent
botanical
river
bacteria
biodiversity
swim
phytoplankton
microbiology
field
chlorophyll
microcosm
algae
travel
sunlight