Grass, trees and other biomass feedstocks consist of a mixture of cellulose, hemicellulose and lignin, a tough material that helps plants keep their shape.
草、树和其他生物基原料是由纤维素、半纤维素以及维持植物外形的木质素组合而成的。
Specifically, lignin is a highly polymerized, amorphous material that makes up the middle lamella of woody fibers and cements the fibers together.
木质素是一种高度聚合的无定形材料，组成木质纤维的胞间薄层将纤维连接起来。
Lignin is a kind of important macromolecular organic material and only inferior to cellulose inside plant, with a content of 15%-30%.
木质素是植物体中仅次于纤维素的一种重要大分子有机物质，在植物体中含量为15% - 30%。
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