英文關鍵字
bulb
conservation
current
darkness
electrical
electricity
energy
evening
generate
glare
glow
hand
illuminate
lamp
light
man
night
off
power
radiate
save
see
shade
shine
sleep
socket
switch
watt
英文關鍵字
bulb
conservation
current
darkness
electrical
electricity
energy
evening
generate
glare
glow
hand
illuminate
lamp
light
man
night
off
power
radiate
save
see
shade
shine
sleep
socket
switch
watt