機器
accuracy
ancient
art
artwork
balance
black
book
business
capra
color
conservation
drawing
energy
engraved
experiment
flat
formula
graphic
gravitation
gravity
hanging
icon
illustration
impact
isolated
line
metal
motion
movement
old
outline
perpetual
physics
picture
power
produce
reflection
research
science
scientist
sphere
swing
symbol
teamwork
thin
toy
vintage
white