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【填空答案】
1.fossilfuel: n.fuel consisting of the remains of organisms preserved in rocks in theearth's crust with high carbon and hydrogen content化石燃料
2.trapped: adj. forced to turn and face attackers捕集的，捕获的
3.remains: n. any object that is left unused or still extant［C］残留
4.sedimentary: adj.resembling or containing or formed by the accumulation of sediment沉积的
5.photosynthesis: n. synthesis ofcompounds with the aid of radiant energy (especially in plants)［U］光合作用
6.decay: v. fall intodecay or ruin腐烂
7.considerable: adj. large orrelatively large in number or amount or extent or degree相当多的，相当可观的
8.nonrenewable: adj.that cannot be renewed 不可再生的
9.alternative: n. one of anumber of things from which only one can be chosen二中选一，可供选择的事物
【听力原文】
Today I want to discussfossil fuels such as coal, oil, and natural gas.
The term "fossil fuel" refers to the trapped remains of plants and animals in sedimentary rock. You see, living plants trap energy from the sun by the process of photosynthesis, and they store the energy in their chemical compounds. Most of that energy is released when the plant dies and decays.However, sometimes organic matter is buried before it decays completely. In this way some of the solar energy becomes trapped in rocks, hence the name“fossil fuel”.
Although the amount of organic matter trapped in any one growing season issmall, the accumulated remains from millions of years are considerable. Becausethe accumulation rate is so slow, millions of times slower than the rate at which we now dig up this organic matter and burn it for energy, we must consider fossil fuels as nonrenewable resources.
Tomorrow we'll be discussing alternatives to fossil fuels that can be renewed.
