英文關鍵字
alpha
art
binocular
black
business
button
close
concept
design
discovery
equipment
eye
focus
glass
icon
image
instrument
lens
look
loop
matted
military
navigation
object
optical
reflection
render
search
see
sight
sign
single
spy
surveillance
symbol
target
technology
telescope
tool
travel
view
vision
watch
white
zoom