英文關鍵字
holding
homemade
small
solar-powered
car
wheels
spinning
shows
concept
energy
conversion
solar
power
mechanical
working
vehicle
powered
business
design
3d
technology
sun
green
future
model
cars
modern
electricity
natural
futuristic
eco
ecology
transportation
motor
environmental
electric
transport
efficiency
mini
drive
show
panel
alternative
clean
printed