那时我接触到的东西绝大部分都是由木头、植物纤维或者石头制成的。
When I reached for something in those days it was almost surely made of wood, fiber or stone.
来自纤维素质的先进生物燃料-植物废物和木头-更好，因为他们不直接同食物竞争，但他们仍然需要适度肥沃的土地来生长。
Advanced biofuels from cellulosic material - plant waste and wood - are better, because they don't compete directly with food, but they still need reasonably fertile land in which to grow.
他们都是有一系列更小的分子组成，它们三种合起来就被称为木质纤维素，尤其是在木头中。
Each is made of chains of smaller molecules, and all three are often bound together in a complex called lignocellulose, particularly in wood.
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