英文關鍵字
aaa
alkaline
arrangement
battery
bin
body
cell
charge
close
colors
component
concept
concepts
conservation
consumerism
current
danger
ecological
electrical
electricity
electronics
energy
environment
environmental
fuel
full
garbage
generation
green
group
heap
industry
macro
mercury
metal
objects
old
pollution
power
recharge
rechargeable
recycling
stack
supply
technology
trash
used
variation
waste