英文關鍵字
air
background
beautiful
blue
bright
brightly
clear
climate
cloud
cloudscape
condensation
cumulus
day
environment
fluffy
freedom
heaven
high
idyllic
light
luxurious
metaphors
meteorology
nature
outdoors
ozone
purity
scene
scenery
scenic
sky
skybackground
skyclouds
skylight
skyline
smooth
space
sparse
stratosphere
summer
sunlight
symbols
tranquil
transparent
vast
vibrant
weather
white
whiteclouds
wind