果胶的

例句：

1. 1.Pectin is a natural substance found in many fruits and vegetables.
   果胶是一种存在于许多水果和蔬菜中的天然物质。
2. 2.The addition of pectin to the dough helps to make it more elastic.
   在面团中加入果胶有助于使其更有弹性。
3. 3. Pectin is used in making jams and jellies because it thickens them without adding water.
   果胶用于制作果酱和果冻，因为它能不加水就使它们变浓稠。