其研究者们改变了这些所谓能量作物的基因，以牺牲其如纤维素这样的碳水化合物为代价，来提高它们木质素的含量。
Its researchers have fiddled with the genes of these so-called energy crops to increase the amount of lignin in them, at the expense of carbohydrates like cellulose.
一个收集纤维素的简单方法就是从作物被加工后的剩余物中提取纤维素——剩余物包括甘蔗的甘蔗渣，玉米的秸秆和小麦的麦秆。
A simple way of garnering cellulose is to gather up the leftovers when these crops have been processed-bagasse from sugar cane, stover from corn and straw from wheat.
是否能依靠更加先进的生物燃料(比如利用非食物农作物或者利用农作物的纤维素部分、甚至利用柳枝稷或者海藻这些非食物作物来制造生物燃料)来解决上述这些问题还是个未知数。
Those problems might or might not be solved by more advanced biofuels, such as those made from the non-food or cellulosic parts of crop plants or even non-food crops such as switchgrass or algae.
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