glucan

例句：

1. 1.The enzyme is a key component of the digestive system.
   这种酶是消化系统的关键成分。
2. 2.Glucan is an important source of energy for many organisms.
   葡聚糖是许多生物体的重要能量来源。
3. 3. In food science, glucan is used to improve texture and shelf life.
   在食品科学中，葡聚糖被用来改善质地和延长保质期。