随着新陈代谢作用的进行，以氨基糖为代表的微生物细胞壁残留物不断在土壤中积累，并进一步参与土壤碳、氮循环。

During the metabolism, the microbial residues represented as amino sugars were accumulated in soil and probably concerned in further carbon and nitrogen cycling.

youdao

They're making that because you need this protein insulin, it's a hormone, and it's important for sugar metabolism in your body.

它们产生胰岛素蛋白是因为你需要它,胰岛素是一种激素,它在糖代谢中起着非常重要的作用

耶鲁公开课 - 生物医学工程探索课程节选