fossil fuel

fuel, eg coal or oil, formed from the decayed remains of prehistoric animals or plants 矿物燃料, 化石燃料（如煤或石油）.

FORTRAN (also Fortran), fortress, fortuitous, fortuity, fortunate, fortunately, fortune, fortune cookie, fortune-hunter, fortune-teller, forty, forty-five (also 45), forum, forward, forward-looking, forwarding address, forwarding agent, forwardness, forwent, fossil, fossil man, fossilization, fossilisation, fossilize, fossilize, fossilise, foster, foster-, fought, foul, foul play, foul-mouthed, foul-up, foully, foulness, found, foundation, foundation course, foundation-stone, foundations, founder, founder-member,