英文關鍵字
green
screen
subscribe
button
get
down
hot
air
balloon
hangs
then
floats
upward
clouds
float
around
multicolored
red
sign
lowers
background
grabs
viewer
039
attention
stimulates
take
action
very
effective
for
youtube
video
英文關鍵字
green
screen
subscribe
button
get
down
hot
air
balloon
hangs
then
floats
upward
clouds
float
around
multicolored
red
sign
lowers
background
grabs
viewer
039
attention
stimulates
take
action
very
effective
for
youtube
video