工程师们尝试用蒸汽，酸和酶把纤维素分解成有用的糖。
Engineers have tried using steam, acids and enzymes to break cellulose into useful sugars.
它的酶可以将纤维素半纤维素分解为糖分子。
Its enzymes decompose cellulose and hemicellulose into sugar monomers.
其中一些细节阐释地很美，比如科学家如何设法合成那些可分解纤维素的酶以制造乙醇，这项科技攻关难度极大。
Some of the details are nice, such as the work of scientists trying to create enzymes to do the difficult job of breaking cellulose down to make ethanol.
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