英文關鍵字
bulb
buy
buyer
cart
choose
choosing
concept
cost
creative
customer
department
diodes
discount
ecological
economy
effective
efficiency
electric
electricity
emitting
energy
hand
hardware
human
interior
lamp
led
light
lightbulb
low
mall
man
market
marketing
purchase
research
retail
saving
shop
sign
store
supermarket
watt