Pectines are located in the transparent layer on the surface of seeds and not the inside of seeds, which is why they are extracted by washing and rubbing instead of grounding to a powder.
果胶位于种子表面的透明层中，而不是种子内部，这就是为什么要通过清洗和揉搓来提取果胶而不是磨成粉末的原因。