The composition of fossil fuels varies with source, type, and degree of refinement . 礦物燃料的成分隨來源、種類和精選程度而變化。
About 90 per cent of the energy used in the united states is derived from the fossil fuels . 美國使用的能量,大約90來源于化石燃料。
How long can we continue to supplement agroecosystems with energy derived from declining fossil fuel supplies ? 由于礦物燃料供應量下降,我們供應農業生態系統能量能持續多久?
Most of the energy sources used in our current technology are the fossil fuels that have been stored in the earth's crust for many centuries . 當代技術領域所使用的大部分能源是已經貯存在地殼內許多世紀的礦物燃料。
Fossil fuel plant feedwater control system - drum type 火電廠給水控制系統.滾筒式