虽然那些组成植物茎干纤维素和木质素的分子不能为酵母所消化，但是某些细菌和其他种类的真菌可以完成这项任务。
Although yeast cannot digest cellulose or lignin, the molecules that form a plant's skeleton, some bacteria and other species of fungi are able to do the job.
第一个定义是相当机械，确定为植物纤维多糖和木质素，能抵抗在男子(6)消化酶水解的组成部分。
The first definition was rather mechanistic and defined fibre as the components of plant polysaccharides and lignin, which are resistant to hydrolysis by digestive enzymes in man (6).
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。
Specifically, lignin is a highly polymerized, amorphous material that makes up the middle lamella of woody fibers and cements the fibers together.
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