英文關鍵字
abstract
arc
background
ball
beam
blue
bright
charge
current
decoration
discharge
education
electric
electrical
electricity
electrode
electron
energy
experiment
gas
generator
glass
globe
glowing
illuminated
lamp
light
lightning
neon
physics
plasma
plasmatron
power
purple
ray
red
round
school
science
scientific
shock
space
spark
sphere
static
technology
tesla
voltage