Noun:

1. fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content

fossils化石fossiln.化石；食古不化的人；守旧的事物fossil fired power units火电机组fossile meteorite crater古陨石坑fossile fred power plant火电厂fossil combustion system化石燃烧系统fossil-fuel power unit单元机组fossil fired power plant火力发电厂fossil landslide revival古滑坡复活fossil / fRsl/ n.化石；fossil energy land supply化石燃料（地）供给fossil-fired power unit火电机组

1. Fossil fuel could be used up one day.
   矿物燃料总有一天会用尽。
2. Coal is usually referred to as a fossil fuel.
   煤通常被称为矿物燃料。