【英语时差8,16】造纸的化工过程（下）

（单词翻译）

 The reason cellulose molecules¹ in paper stick together after they’re wet is that they are made of long strings² of glucose³ molecules — one of the components⁴ of common table sugar. When cellulose is beaten into a watery⁵ pulp⁶, some of the glucose molecules dissolve in the water. Then, when the pulp is spread in a sheet to dry, the glucose re-bonds with the cellulose molecules to hold the paper together. The strongest and most permanent paper would be made entirely⁷ from long fibers⁸ of pure cellulose. But, because paper comes from a variety of natural materials that are made of much more than pure cellulose, other chemicals, mixed in with the cellulose weaken the paper and cause it to break down faster.