英文關鍵字
experiment
scientific
oxygen
process
hydrogen
chemistry
chemical
laboratory
science
electric
power
energy
electricity
water
aquarium
bubble
copper
cable
electrolysis
releasing
bubbles
inside
英文關鍵字
experiment
scientific
oxygen
process
hydrogen
chemistry
chemical
laboratory
science
electric
power
energy
electricity
water
aquarium
bubble
copper
cable
electrolysis
releasing
bubbles
inside