英文關鍵字
bill
billing
bills
british
business
charge
clock
close
company
concept
consumption
cost
crisis
current
customer
dial
dials
digits
disc
domestic
economy
electric
electricity
energy
expensive
higher
hike
increase
industry
inflation
kilowatt
kwh
living
measure
measuring
meter
money
number
numbers
power
price
prices
reading
red
rise
rotating
rotor
saving
showing
slow
slowly
spend
supplier
supply
technology
turning
utility
voltage