undigestible

常见例句

• The human gut microbiota performs functions that are not encoded in our Homo sapiens genome, including the processing of otherwise undigestible dietary polysaccharides.
  人体的肠道中微生物可以执行一些不用基因组编码的功能，包括分解不能消化的膳食多聚糖。
• It was the most undigestible sawdust I ever see;
  这种木屑之难于消化，是我见所未见的了。
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