假如这一反应需要数小时而不是几秒钟，那么燃料成本就太高了。
If the reaction took hours, and not seconds., the fuel costs would be prohibitive.
公司希望在此之前能降低生物燃料的成本。
Before then the company hopes the cost of biofuel can be brought down.
因为风是免费燃料，所以风能的边际成本几乎为零。
The marginal cost of producing wind power is almost nothing, since the fuel—wind—is free.
电池以及燃料的成本将决定充电式汽车的成败。
Battery and fuel costs will determine if plug-ins shoot ahead or stall out.
如今，燃料电池普及的最大障碍在于它的成本。
不管哪种方法，氢燃料的运输本身都会带来太大的成本。
Either way, the hydrogen fuel finishes up costing way too much.
尽管燃料不贵，建造设施的成本却很高昂。
Though the fuel is inexpensive, building facilities is pricey.
这并不完全出自于全心全意的奉献精神：环保型引擎也需要更少的燃料，从而降低成本。
It is not just altruism: greener engines also use less fuel, and so cut costs.
加上燃料电池技术的成本分析说明，将来如何变化的论述。
The cost of split analysis has been done for the fuel cell technology and how it will change in future.
目前，以植物纤维素为原料生产燃料乙醇的成本仍较高。
Current cost for production of ethanol from cellulose plant is still high.
航运企业最为主要的成本是燃料油消耗成本。
Fuel consumption is the most major cost of shipping companies.
燃料混合泵的成本将会更接近于e85泵浦的成本。
The cost of a blending pump would more closely match that of an E85 pump.
但是，这种获取燃料的方式还存在一个障碍：从充斥着藻类的水中收集油料的成本是极其昂贵的。
There's just one snag—harvesting the oil from algae-filled water is prohibitively expensive.
但是，这种获取燃料的方式还存在一个障碍：从充斥着藻类的水中收集油料的成本是极其昂贵的。
There's just one snag—harvesting the oil from algae-filled water is prohibitively expensive.
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