fuel
simple noun47 搭配平均频率: 7.5
fossil fuel9.5
fuel such as coal or oil, that was formed over millions of years from the remains of animals or plants
diesel fuel8.8
a type of heavy oil used as fuel for diesel engines
fuel used for aircraft
the amount of fuel used
the relationship between the amount of energy produced and the amount of fuel used
fuel economy8.1
the efficiency of a vehicle in terms of the amount of fuel it uses