英文關鍵字
altocumulus
astronomy
atmospheric
background
beautiful
beauty
cirrocumulus
cirrus
cloud
clouds
cloudy
colorful
colors
corona
cosmos
crystals
diffraction
fire
group
halo
heat
heaven
iridescence
iridescent
irisation
lenticular
meteoric
move
nature
optic
phenomen
physics
pink
quickness
rainbow
rainbows
rare
science
scientific
sky
spectral
spectrum
spring
steppe
stratum
summer
sun
velocity
watch
water
wind
yellow